The Harken 45mm Element Stand-Up Block with polyurethane boot. Harken designed Element stand-up blocks for sheeting and halyard systems, running backstays, controls and other applications where you don't want the block to hit the deck. Element blocks use forged aluminum sideplates with compound curves for strength, paired with a proven journal bearing, so they cost significantly less size-for-size than Harken's other blocks. The sideplates are hardcoat-anodized to resist corrosion, and the tough composite bearing sheave is built for a long service life.

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