18 1/2″ OAW; 16″ BF ..SINGLE GROOVE ROLLER; SPRBG BEARING; 2.0″ DIA ROLLER, SINGLE GROOVE
18 1/2″ OAW; 16″ BF..DOUBLE GROOVE ROLLER, SPRBG BEARING; 2.0″ DIA ROLLER (2) GROOVE ATONE END
18 1/2″ OAW; 16″ BF..DOUBLE GROOVE ROLLER, SPRBG BEARING; 2.0″ DIA ROLLER STANDARD GROOVE AT EACH END