This block attaches to the strap eye in the hull that is forward of the ratchet block. Also great for Barber haul on a Daysailer. Lightest and smoothest of it's kind! 3/8" max line Sheave 1-9/16 H2650Regular price: $27.35Sale price: $24.07 Shackle for Opti Blocks3/16 Stainless Shackle Shackle pin dia. (in) 3/16 Weight (oz) .29 A (in) 1/2 B (in) 7/16 H072Regular price: $4.40Sale price: $3.50 Stainless Steel Spring Gate Snap Hook for Optimist or Sunfish mainsheetThis is the simple way to attache and detach the mainsheet from the boom bridle on the optimist. Easy for little fingers yet very secure and strong. Also perfect for a 7mm main sheet to attach to the cable traveler on a Sunfish. A: 2" B: 7/16" C: 1/4" 154250Regular price: $4.95Sale price: $2.99 WE SHIP WORLDWIDE! Due to the wide variety of the size and weight of our items we will charge the actual cost of shipping in a separate charge on all orders.You may email us for a shipping cost estimate. Send us email intensitysails(at sign)mac.com