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Description
Ronstan Series 40 Fiddle, Becket, Adjustable Cleat, Universal HeadProduct Description Ronstan Series 40 Fiddle, Becket, Adjustable Cam, Universal Head Features Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Captive Lock universal head Slotted pin shackle eliminates fouled lines Snap fit removable becket pin Multi position cleat arm Low friction, 2 stage ball bearing system Sheave 1 9 16 + 15 16 in. Max. Rope 5 16 in. Max. Cable Pin 3 16 in. M. W. L. 770 lb B. L.
Product Description
Ronstan Series 40 Fiddle, Becket, Adjustable Cam, Universal Head
Features
Low friction Acetal or Torlon bearing system
Lightweight
Cheek cut-outs for easy bearing maintenance
Captive Lock universal head
Slotted pin shackle eliminates fouled lines
Snap fit removable becket pin
Multi-position cleat arm
Low friction, 2-stage ball bearing system
Sheave 1 9/16 + 15/16 in.
Max. Rope Ø - 5/16 in.
Max. Cable Ø - -
Pin Ø - 3/16 in.
M.W.L. 770 lb
B.L. 2200 lb
Weight - 5.7 oz.
Product Information
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removeable so line can be spliced prior to fitting and is i
Applications
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sports boats up to 8m 926 ft)
Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.
Materials
Acetal ball bearings
UV stabilized Acetal sheave
UV stabilized Acetal sheave
Grade 316 stainless steel load strap and head fitting
Features
Product Information
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removeable so line can be spliced prior to fitting and is i
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
4.9 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 1
Too Cumbersome
Size: 6 Panel-119"W, Color: Black
Didn’t realize there were over 100 pieces to put this thing together. Had I been advised of that I would not have ordered this thing. Wayyyyy too much of a production to put it together. Nope. Returned.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2026
★★★★★ 3
Great Product, But Non-Existent Seller Support
Size: 6 Panel-119"W, Color: Black, Size: 6 Panel-119"W, Color: Black
The Good:
Well Designed: Sturdy and aesthetically pleasing.
Effective: Perfectly obstructs the afternoon sun glare from my monitor screens.
Moderate Assembly: Straightforward and easy for the most part.
The Bad:
Defective Part: One crossbar end was missing threads, preventing the assembly of the sixth panel.
Zero Communication: I emailed the seller as instructed and waited 8 days with no acknowledgment.
Return Logistics: Amazon offered a return, but the box is heavy, and disassembly/repackaging would be a major task.
Final Verdict
I really like this product, but I’m deducting two stars for a total lack of customer service. I’ve decided to buy tools and fix it myself rather than deal with a heavy return. I hope the seller sees this and reaches out. The lesson learned is to check every part of a product before assembly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 10, 2026
★★★★★ 5
This is definitely a buy
Size: 6 Panel-119"W, Color: Black
Excellent product.Good Quality.Very sturdy .Easy to assemble.Provide privacy and keeps the light out just what I needed.I am happy to recommend this divider .Do not hesitate to buy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 7, 2024
★★★★★ 5
Clean Look, Sturdy — can’t ask for more!
Size: 6 Panel-119"W, Color: Grey, Size: 6 Panel-119"W, Color: Grey
Really like how it folds so I can create kind of a doorway with two of these. Pretty easy to assemble and has an uncluttered clean look due to the smooth fabric and nice color. Oh and it’s sturdy enough for pets.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2024
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
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