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Description
Ronstan Series 40 All Purpose Block - Single - Stand UpSeries 40 All Purpose Block Single Stand Up 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. Captive Lock universal head can be fixed in either of two
Series 40 All Purpose Block - Single - Stand UpAll 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. Captive Lock universal head can be fixed in either of two planes, or free to swivel as required.
Features:
- Exceptionally high working loads
- Low maintenance, long service life
- Self-lubricating sheave
- Captive Lock universal head
- Mount with 2 x 5mm (3/16") fasteners (not supplied)
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")
M.W.L.: 400kg(880lbs)
B. L.: 800kg(1,760lbs)
Weight: 72g(2.5oz)
Manufacturer : Ronstan
Manufacturer Part No : RF41140
UPC : 9316800244362
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
4.3 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Amazing book
Format: Hardcover
Amazing book. The plot twist at the end totally surprised me. The characters are so well written and I had so much fun going on a journey with them. The characters seemed to jump out of the book and the feelings and actions seemed very much like teenage actions. As an escape room lover I loved at the puzzles the teens had to solve along the way. I can't wait to see what happens next.
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Reviewed in the United States on May 7, 2026
★★★★★ 3
Great YA Thriller
Format: Audiobook
I thought this book was well written and fast paced. Everything you want in a good thriller. It was written exactly like a dramatic reality show and it kept you guessing until the end. It was a quick fun read if you are in the mood for a reality show that has the feeling of clue and and escape room all in one.
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Reviewed in the United States on June 2, 2026
★★★★★ 4
Exciting YA adventure
Format: Hardcover
📚 Do you find yourself shouting answers at game shows? Have you ever braved an escape room? Or maybe you’re just a sucker for a book with stenciled edges? If you answered "yes" to any of the above, I invite you to step into this original YA murder mystery.
The plot follows a team of teenage contestants navigating an escape-room-themed reality show through, puzzles, sabotage, betrayal, and... murder.
💭 I showed up for the pretty book cover, but stayed for the cleverness of the plot. It was suspenseful, entertaining, and very educational! I think adults and teens alike will get a kick out of the riddles woven throughout the story.
The characters were such a highlight for me. Watching four complete strangers transform into a close-knit team over the course of the season was so fun. Friendship, loyalty, and trust are the heart of the book, but there’s also plenty of romance, crime, and amateur sleuthing. I was hoping for a slightly different direction for the finale, but it was still an unexpected, action-packed ending.
⚖️ All in all, the story inside was just as good as the "pretty book" aesthetic on the outside. This was an exciting, fresh YA mystery. 4/5 ⭐ from me!
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Reviewed in the United States on April 11, 2026
★★★★★ 5
Nerdy Mystery
Format: Hardcover
Such a fun, game-solving, while murder-mystery-solving, good time! I think Tamara Moss' crime thriller influence really shines with Marissa's collaboration!b while i got some of the puzzles, the whodunnit twist was a surprise! A good time that should be far reaching beyond just "YA"
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Escape room
Format: Hardcover
Once I started reading I couldn’t put it down!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
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