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Ronstan ball bearing Orbit Blocks boast the highest strength-to-weight ratio available, achieved through all-composite reinforced polymer materials and multiple attachment options. Use the 20mm BB for control lines on catamarans and dinghies to 16 feet (5m), especially downhaul, outhaul and spinnaker halyards.
Integrated stainless steel hub to accept lashing attachment and through-sheave becket.
Suits up to 4mm (5/32") lashing.
High compression strength carbon Acetal sheave.
Stainless steel ball bearings.
Dyneema lashing cord included.
Specifications: 3/4" (20mm) sheave diameter; 1-1/4" long x 3/4" wide x 9/16" deep; 1/4" (6mm) maximum rope size; 550* lb. maximum working load; 1210 lb. breaking load; weighs only .3 oz.
*Block must be lashed through hub. MWL and BL are dependent on the strength of lashing. Knots, splices, stitching will generally have a lower BL than the line itself.