Ronstan Series 40 Ball Bearing Orbit Block - Single - Stand-Up Swivel Head

Ronstan Series 40 Ball Bearing Orbit Block - Single - Stand-Up Swivel Head. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life these blocks are the right choice for sheets halyards and control line applications for cruising and racing