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Description
Ronstan Series 40 All Purpose Triple Block w/ Swivel HeadProduct Description Ronstan Series 40 All Purpose Triple Block w Swivel Head Features: Exceptionally high working loads Low maintenance, long service life Self lubricating sheave Slotted pin shackle eliminates fouled lines Two way head post Spare parts RF41010 Replacement Becket Pin, RF150 Shackle Specifications Sheave 1 9 16 in. (40mm) Max. Rope 7 16 in. (10mm) Max. Cable in (mm) Pin 3 16 in. (5mm) M. W. L. 1540 lb. (700 kg) B. L. 3090 lb. (1400 kg)
Product Description
Ronstan Series 40 All Purpose Triple Block w/ Swivel Head
Features:
Exceptionally high working loads
Low maintenance, long service life
Self-lubricating sheave
Slotted pin shackle eliminates fouled lines
Two way head post
Spare parts - RF41010 Replacement Becket Pin, RF150 Shackle
Specifications
Sheave Ø - 1 9/16 in. (40mm)
Max. Rope Ø - 7/16 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - 3/16 in. (5mm)
M.W.L. - 1540 lb. (700 kg)
B. L. - 3090 lb. (1400 kg)
Weight - 6.9 oz. (195 g)
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.
Applications:
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Materials:
U.V. stabilised Acetal sheaves
Impact and U.V. resistant, fibre reinforced Nylon cheeks
Grade 316 stainless steel bearing race
Grade 316 stainless steel load strap and head fitting
Sheave: UV stabilised acetal
Cheeks: Impact modified, fibre reinforced and UV stabilised nylon
Features:
Specifications
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.
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
4.1 ★★★★★
Based on 7 reviews
Sort
Product Reviews
★★★★★ 4
Great Pillows
Style: Side Sleeper, Pattern Name: King
I was very skeptical about purchasing pillows online. After much research, I decided to buy two of the king size pillows. When they arrive, they were rolled up tightly in plastic. I fluffed them up and got new pillow cases for them. The first few days, I was tossing and turning. After giving them a few days, I can honestly say they are very nice pillows. Not to firm and not to soft...a very nice medium! They have a cool feeling when you lay on them. These pillows are great for those who sleep on their back AND side sleepers. No feathers have been poking out. My significant other LOVES these pillows. Been sleeping great and feel like I made a great decision getting these. Great value, great materials and great quality. I highly suggest trying these out if you're looking to replace your pillows.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2022
★★★★★ 5
Serta Pillows
Style: Side Sleeper, Pattern Name: King
They’re very comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
★★★★★ 3
Great quality but big
Style: Side Sleeper, Pattern Name: King
These pillows seem to be very good quality. I couldn’t wait to try them. I soon realized that they’re very thick & too high for my neck. I can push the pillow down but it doesn’t stay so I’d say they’re too firm for me & don’t support the neck properly because of the height.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2025
★★★★★ 5
my fav now after using 50+ pillows
Style: Back Sleeper, Pattern Name: King
I have always struggled to find the perfect pillow, and so far I have had 50+ pillows. Personally, I like my pillow to be on thinner side as I look for more support for my neck.
This is my first time buying pillows online, because I like to physically touch and feel the firmness and thickness before I purchase my pillows. I am so glad I did it! These pillows are just PERFECT for me! Perfect firmness, perfect thickness and perfect material.
One thing I suggest is that be extra cautious when you open the package. These pillows were rolled and put in a relatively thin shipping bag, so when you open with sharp objects be careful not to cut your new favorite pillows!
I let the pillows sit for about 48 hours before I started using them, but I assume you don't have to wait that long.
Overall, I am very happy with my first online pillow purchase with Serta!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2020
★★★★★ 2
Not worth it
Style: Side Sleeper, Pattern Name: King
Feel nice and fluffy for couple months, then go flat
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025
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