29mm Single Fixed Carbo Block is great for the halyard on the Optimist. Use as the lower block with a piece of spectra line and a Harken hook in block. Description *Single / fixed *Sheave dia. (in) 1-1/8 *Length (in) 1-15/16 *Weight w/shackle (oz) 0.8 *Max. line dia. (in) 5/16 *Breaking strength (lb) 1000 H348Price: $17.25Sale price: $14.99 WE SHIP WORLDWIDE! We charge the actual cost of shipping. You may email us for a shipping cost estimate. Send us email intensitysails(at sign)gmail.com US$10 MINIMUM ORDER