LEWMAR 90mm Synchro Double Block - Swivel, 29929002BK Block Size_38 mm Harken 51mm Single High-Strength Block

Harken 51mm Single High-Strength Block to carry wire halyards and high-strength control lines

Formulated to lubricate pawls

leaving minimal material for final hand sanding with the Teakdecking Systems Seam Sander

and for high-load control lines on small keelboats

LEWMAR 90mm Synchro Double Block - Swivel, 29929002BK Block Size_38 mm Harken 51mm Single High-Strength BlockThe 90mm double block is well suited for vangs, mainsheet systems, and halyard tuning systems. The larger sheave diameter works well with lines up to 9 16". Synchro blocks combine geometry, sheave ratios, and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing but at a more affordable price. Designed to optimize the relationship between block and line, these blocks have self aligning