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Description
Ronstan Series 75 Core Block stand-up KitProduct Description Ronstan Series 75 Core Block stand up Kit Features Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Durable aluminum alloy cheek plates Central hub hole can be used as a becket take off or tie up point Accepts up to 14mm (9 16") rope Sheave Max. Rope 9 16 in. Max. Cable in Pin in. M. W. L. 3300 lb. B. L. 6600 lb. Weight
Product Description
Ronstan Series 75 Core Block stand-up Kit
Features
Class leading performance and sleek, contemporary styling
Excellent dynamic and high static load performance
Less than half the friction of the nearest competitor
Durable aluminum alloy cheek plates
Central hub hole can be used as a becket take-off or tie-up point
Accepts up to 14mm (9/16") rope
Sheave Ø - -
Max. Rope Ø - 9/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 3300 lb.
B. L. - 6600 lb.
Weight - 15.3 oz.
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing -
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear.
Applications
Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft)
General applications on larger yachts
Alloy sheave models are available for use with wire
To suit RF130003, RC13012, RC13023 Series 30 Ball Bearing Traveler cars
Materials
Sheave: U.V. stabilised acetal or anodised aluminum (AW models)
Cheek plates: Aluminum alloy
Ball bearings: high compression strength carbon black acetal
Features
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing -
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear.
Applications
Materials
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
My puppy loves this set
Color: 9 Pack (No-stuffed Fox)
It’s been 15 years since I had a puppy so after I adopted a 9 week old puppy, then I realized I had no toys for her! I wanted a variety at a reasonable price. And fast too! This arrived the next day and she immediately started playing with everything. I think her favorite is the fox but she loves them all. The first time she heard the avocado squeak was priceless. She also loves the rope toys but they shred so I limit her time alone with them.
These probably won’t last a long time but they were a good price for a lot of variety of items. She is happy so I’m happy. Thanks
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Reviewed in the United States on May 2, 2026
★★★★★ 3
Poop bag and treat dispenser questionable
Color: 9 Pack (No-stuffed Fox)
This is a hard one. The toys seem great. The whole box smells of the poop bags and I don't think they should be a part of the purchase. The bigger issue i see is the treat ball seems to have a weird plastic coating on it. Almost like a thin clear coat that gives is a peeling feeling and I don't think it is safe for the puppy.
Excited to see how she likes the other toys though.
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Great durable toys for baby/small dogs
Color: 9 Pack (No-stuffed Fox)
These were perfect for our 8 week old dachshund. She loves every one of the toys.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Great Variety for Teething Puppies, Keeps Him Busy!
Color: 9 Pack (No-stuffed Fox), Color: 9 Pack (No-stuffed Fox)
I got this 9-pack toy set for my 11 lb chihuahua-terrier mix puppy, and it’s been very well received by my little guy. He’s been bored being in quarantine until his vaccines kick in and he's also teething. This toy set has made a huge difference.
Great variety - you get a combination of rope toys, plush squeaky toys, and even a treat ball, so he often rotates between them depending on what he wants. The rope toys have been especially good for teething, while the softer toys keep him entertained. One of the plush toys has that crinkly texture inside, which he loves.
The treat ball is a nice bonus too. I've put treats and his dog kibble in there throughout the day, and it helps keep him engaged and also mentally tires him out.
Everything is sized well for a small puppy and light enough for him to carry around easily.
The materials feel decent for the price, especially considering how many toys you get. That said, I do keep an eye on him with the softer ones since he’s still a puppy and likes to chew.
Pros:
Good mix of rope, plush, and interactive toys
Great for teething and keeping him occupied
Treat ball adds a mental challenge
Good size for small dogs/puppies
Nice value for the number of toys
Cons:
Softer toys may wear down faster with heavier chewing
Overall, this has been a really useful set during a phase where he’s both teething and needs a lot of mental stimulation. I’d recommend it for small dogs or puppies, especially if you want a variety instead of buying individual toys.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Perfect Puppy Starter Toy Set
Color: 9 Pack (No-stuffed Fox), Color: 9 Pack (No-stuffed Fox)
This toy pack is such a great value for puppies. My puppy stayed entertained for hours and loved having different textures to chew and play with. The toys feel soft but still durable enough for everyday use. A few of the smaller toys are better for light chewing, but overall it’s a fun variety pack for keeping a puppy happy and active.
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Reviewed in the United States on May 8, 2026