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Spin sheaves to distribute the soap solution evenly
Harken 38mm Big Bullet Single Block with becket and swivel allows either a 2:1 or 3:1 purchase
Not suitable for high-speed rotating applications
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and spinnaker systems
SCHAEFER 37mm Flat Base Double Cheek Block, 303-29 Tracks & Accessories_Tracks Spin sheaves to distribute theUse as sheet control blocks on dinghies, or for control lines on larger boats. High impact Delrin sheaves turn on polished stainless steel spacers, so the cheeks won't squeeze or bind the sheave, even under extremely heavy loads. Head shackles are stamped stainless steel with a clevis pin and cotter ring. Cheeks are black hard coated anodized aluminum. Straps, headclips, shackles, and rivets are tumbled and polished stainless steel. A flat, stainless
