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Description
Ronstan Series 50 High Load Block - Single - Universal HeadSeries 50 High Load Block Single Universal Head Ideal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire. Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Features: Exceptionally high working loads Lightweight Cheek cut outs for easy bearing maintenance Suitable for both rope or wire Captive Lock universal head
Series 50 High Load Block - Single - Universal HeadIdeal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required.
Features:
- Exceptionally high working loads
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Suitable for both rope or wire
- Captive Lock universal head
- Slotted pin shackle eliminates fouled lines
Applications:
- Mainsheet
- Spinnaker sheets
- Halyards and other primary applications on boats up to 10M(33')
Materials:
- Nylatron® sheave
- Grade 316 stainless steel load strap and head fitting
- Impact and U.V. resistant, fiber reinforced Nylon cheeks
Specifications:
Sheave Ø: 50mm(2")
Max. Rope Ø: 12mm(1/2")
Max. Cable Ø:5mm(3/16")
Max. Pin Ø: 5mm(3/16")
M.W.L.: 800kg(1,760lbs)
B. L.: 1,500kg(3,310lbs)
Weight: 117g(4.1oz)
Manufacturer : Ronstan
Manufacturer Part No : RF50100HL
UPC : 9316800241453
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.4 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Great book to help establish a palette for a software, web or art project
Format: Paperback
I love this book for helping me establish a color palette for art projects that I want a Japanese feel to. Also just generally good for getting inspiration for color palettes that just plain look good. I've always, since I can remember from my youth, felt drawn to the Japanese color combinations in kimono. fashion, origami paper and even toys. Maybe it's a consequence of growing up in Hawaii with all the Japanese influences I had -- or, as I suspect, it's just really good color application. This book helps me find the colors I want that go together the way I want. I use the examples in this book with a Color Muse to pick my digital color palette.
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Reviewed in the United States on April 20, 2025
★★★★★ 5
Loved it! Worth the buy!
Format: Paperback
Loved this color combo book! The book includes a wide array of color combinations, plus history on the artist, which I appreciate!
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Reviewed in the United States on April 17, 2026
★★★★★ 4
Terrific content, soft cover.
Format: Paperback
It is way smaller than expected but it is amazing in content. The only think I do not like is that it has an extremely soft external cover, which worries me on the long run.
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Reviewed in the United States on May 29, 2025
★★★★★ 5
Useful and creative gift
Format: Paperback
I bought this for my friend since she has really been into sewing and dressing up in bolder outfit. When she saw the book, she told me she has been eyeing this and was really interested in the different color combinations. It is a small but unique book with so many different patterns and color combinations that can inspire people's lives with how they dress or decorate their living area.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Get It!
Format: Paperback
Fast shipping and great product! Perfect for fashion designers
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Reviewed in the United States on August 18, 2025