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Acrylic lens replaced by mineral crystal lens for improved clarity and durability
Series 40 Orbit BB Sheave
High Polish
model SSM-70
Ronstan Series 40 Ball Bearing Orbit Block - Cheek Boat RS Aero Acrylic lens replaced by mineralSeries 40 Ball Bearing Orbit Block Cheek Features: Ultra Lightweight Low friction 2 stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating Base suits curved mounting surface Low mounting points for maximum strength Lightweight Kilogram for kilogram of working load, BB and RT Orbit Blocks are the worlds lightest. The unique orbital design allows the bearing to only be in the active areas of
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