Pay in installments of $12.94 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 17 - Jun 22
For Your Every Summer RSVP, with Code: SUMMER15
Description
Ronstan Series 50 All Purpose Block - Single Stand Up [RF51140]Series 50 All Purpose Block Single Stand Up Features: Exceptionally high working loads Low maintenance, long service life Self lubricating Acetal polymer sheave ensures low friction and extreme durability Captive Lock universal head Slotted pin shackle eliminates fouled lines Mount with 2 x 5mm (3 6") fasteners (not supplied) All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless
![Ronstan Series 50 All Purpose Block - Single Stand Up [RF51140] Ronstan Series 50 All Purpose Block - Single Stand Up [RF51140]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/70680XL.jpg?v=1643815138)
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
4.0 ★★★★★
Based on 1969 reviews
Sort
Product Reviews
★★★★★ 5
Recommend
Size: 90 Count (Pack of 1)
Excellent quality supplement. Easy on the stomach and helps with relaxation and sleep. You can really feel the difference. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
Beneficial Sleep Benefits
Size: 90 Count (Pack of 1)
I have just started taking this item and it seems to work. My sleep is better, deeper and I awaken feeling rested. I strongly hope that this item will continue giving me great sleep results! The Magnesium is very beneficial too. I would recommend this supplement! I will purchase again provided it keeps working!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
Reliable
Size: 90 Count (Pack of 1)
The brand has a good reputation. I prefer to order products with the Thorne brand than others, because of its reputation.
The magnesium by Thorne is well worth the price. It is reputable and for sleep it works well. Other health benefits are included so not just for sleep but overall health. Good product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
Great brand great quality
Size: 90 Count (Pack of 1)
I bought this supplement during my pregnancy and absolutely love the quality of Thor supplements. It mainly contains magnesium and I highly recommend this brand. They use the purest ingredients and the effects are truly impressive. Since magnesium can cause side effects I was pleased to find this one didn’t have any for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Great product
Size: 90 Count (Pack of 1)
really does help with sleep and muscle relaxation! 10/10 product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

![Whitecap Teak Swim Platform w/2-Step Telescoping Ladder f/Boats w/Outboard Motors [68900]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/71044XL.jpg?v=1643817038)
![Whitecap Teak Swim Platform w/3-Step Telescoping Ladder f/Boats w/Outboard Motors [68902]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/71045XL.jpg?v=1643817046)
![Safe-T-Alert 62 Series Carbon Monoxide Alarm - 12V - 62-541-Marine - Surface Mount - Black [62-541-MARINE-BL]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/71056XL.jpg?v=1643817136)
![Whitecap Teak Swim Platform w/3-Step Telescoping Ladder f/Boats w/Inboard/Outboard Motors [68906]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/71047XL.jpg?v=1643817064)