![Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head [RF41200]](https://cdn.shopify.com/s/files/1/0538/9769/1296/products/65757XL.jpg?v=1660243049)
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Description
Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head [RF41200]Series 40 All Purpose Block Double Block Full Swivel Head All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely. Features: Exceptionally
Series 40 All Purpose Block - Double Block - Full Swivel Head
All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely.
Features:
- Exceptionally high working loads
- Low maintenance, long service life
- Self-lubricating sheave
- Slotted pin shackle eliminates fouled lines
- Two way head post
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')
Materials:
- U.V. stabilized Acetal sheaves
- Impact and U.V. resistant, fiber reinforced Nylon cheeks
- Grade 316 stainless steel bearing race
- Grade 316 stainless steel load strap and head fitting
Specifications:
- Sheave Ø: 40mm(1-9/16")
- Max. Rope Ø: 10mm(7/16")
- Pin Ø: 5mm(3/16")
- M.W.L.: 600kg(1,320lbs)
- B. L.: 1,200kg(2,650lbs)
- Weight: 135g(4.8oz)
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
4.7 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 4
Solid Anker quality, but listing needs actual dimensions
Color: Black, Set name: 1 Pack
Charging works exactly as you'd expect from Anker. 15W MagSafe-compatible, grips the back of the phone firmly, no heat issues, no drop-offs during overnight charging. Zero complaints on function.
My gripe is with the listing, not the product. I was building this into a 3D-printed nightstand dock and needed the exact diameter and thickness to model the recess. Amazon's listing doesn't give you those dimensions, so I spent way too long digging through Q&A and other reviews piecing it together from people who measured theirs with calipers. For a product that people absolutely do integrate into custom mounts, cases, and furniture, leaving out basic physical dimensions is a miss. Weight isn't listed either, which matters if you're mounting it. Fix the listing and this is a 5-star.
Compact enough once you have it in hand, plays nicely with a standard USB-C PD brick (not included, worth noting), and compatibility with my MagSafe case was seamless. Included accessories are just the charger and cable, so plan on supplying your own wall adapter.
Trust the Anker name, just wish the product page respected buyers enough to publish the measurements.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Even better than the more expensive options
Color: White, Set name: 2 Pack
I’ve tried a few different wireless chargers, and these really impressed me. They charge quickly, connect easily, and stay in place without any fuss. The magnetic hold is strong and reliable, which makes everyday use super convenient.
Honestly, they’ve worked even better for me than the Apple ones I’ve used before. Getting a two-pack is also a great value. Definitely a solid upgrade for anyone looking for a dependable charger.
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Love anker
Color: White, Set name: 1 Pack
Anker is always my go to. Their products are high quality and reliable. This charger isn’t my main charger, but I have had no problems with it for the few months I’ve had it. It’s perfect for a public area where guests have either a lightning or USB-C port because it charges either type of phone as long as their phone has a magnetic charging back. It does warm up after keep it on it for too long but that’s expected. Great value, worth the buy. just get it lol
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Reviewed in the United States on February 28, 2026
★★★★★ 5
These Work with My Pixel 10 Pro
Color: White, Set name: 2 Pack
I purchase these without seeing the "Apple only designation" by accident but I am happy to report that these are working properly with my Pixel 10 Pro. They charge around 12.5W normally with some fluctuation up or down depending on load & need so they're instantly about twice as fast charging as a lot of the other 15W wireless chargers from competitors. I have not experienced the issue with the charger shutting off at 80% and no longer charging past that point. Nor have I had the issue with needing to unplug/re-plug in the charging for it to work each time.
Rather, these chargers work at/near the advertised charging power rates, at a reasonable temperature (not overly hot), and fully charge my phone. I believe that the work done by Google/Anker behind the scenes has greatly improved the ability to utilize this product from how it was 3 months ago, let alone the mess that it was 6 months ago.
The magnetic attraction is strong enough to stay in place but also not too strong that it is difficult to remove it. And the ability to utilize it while still using my phone is truly great.
While I cannot speak for the success of others, I personally am a big fan of the product as a non-Apple phone owner.
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Reviewed in the United States on March 7, 2026
★★★★★ 4
Great charger!
Color: White, Set name: 1 Pack, Color: White, Set name: 1 Pack
Great charger. Doesn’t get my phone super hot like the last charger I had. Great price for upgrading to a new charger. Got it in white so I can easily fine it next to my bed. My phone does say slow charger when I put the charger on, but it seems to charge pretty quick!
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Reviewed in the United States on May 25, 2026
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