RONSTAN Series 70 Orbit Block Accessory, Double Dyneema Link

RONSTAN Series 70 Orbit Block Accessory, Double Dyneema Link   Series 70 BB Ball Bearing & RT Ratchet Orbit Blocks   The Orbit Blocks are designed to handle lines up to 1/2" diameter. Ideal for sheet applications on keelboats up to 30' and control lines on larger boats.   Sheave: Carbon reinforced, PTFE impregnated engineered nylonBall Bearings: Series 70 BB Ball Bearing & RT Ratchet Orbit BlocksSheave Size: 2-3/4" (70mm)Line Dia.: 1/2" (12mm)Cheek Material/Finish: Glass-reinforced nylon