Description
This block is engineered with a free-spin mechanism and optimized geometry for smooth operation. It is ideal for use in mainsail systems, boom vangs, mast foot blocks, and masthead blocks. The block has a maximum line size of 3/8" (10mm) and weighs 13.06 oz (371 g).
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | LEWMAR |
| Part Number | L03I 29926003BK |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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