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Ships within 48 hours · Estimated delivery Jun 16 - Jun 21
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Description
20 mm Ball bearing Block - Single, LeadThe Seldn BBB20 Single Stand Up Block is a 20mm ball bearing block designed for control lines on dinghies and keelboats. Made with stainless steel ball bearings and glass fiber reinforced polyamide, it is lightweight yet strong. The block is easy to install with the included deck mounted bracket and spring. BlockType: standup,single SubType: standup single Breaking Load: 300 kg Safe working Load: 150 kg System: BBB20
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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- 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
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 2036 reviews
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Product Reviews
★★★★★ 5
Great wire
Size: 2 Colors each 10FT, Style: 22AWG
I needed a flexible durable wire to fix an old model train. It worked perfect. Wire is generally wire. If you require all the special features of this wire it will meet all your needs
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Reviewed in the United States on February 4, 2020
★★★★★ 5
Nice quality
Had to return due to our mistake but the mechanic said it was good quality. Ordered the correct size and worked great.
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Reviewed in the United States on March 30, 2025
★★★★★ 5
Perfect fit
Worked great for a 1965 mercury thunderbolt 150hp
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Reviewed in the United States on June 3, 2025
★★★★★ 5
MerCruiser Replacement Parts
OEM quality MerCruiser Alpha 1 Gen1 replacement part. Everything you need and some things you don't because it's a universal kit that works for several models.
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Reviewed in the United States on July 19, 2025
★★★★★ 5
OEM is always the answer
No reason not to go OEM for this! Came with every possible gasket and seal I could need. Specifically for my Alpha One Gen 1 it took maybe 25-30 min to completely install.
While you’re there check the base plate for wear and the other surrounding items like your water tube. Rather keep the lower unit off for an extra day to get another part than a catastrophic failure.
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Reviewed in the United States on September 9, 2025
