Cable pulley block advantages>> All Powder Coating with Plastic Coated Heavy Duty assembly suitable for Cables up to 125mm Diameter. Steel Frame Fitted Large waited steel roller running on sealed ball bearings. Base Size : 560mm × 330mm × 330 (L × W × H)....also can be customized Roller Size : 115mm Dia × 190mm Length Both Ends of Rollers, fitted ZZ Bearings with Bearing Covers.and we also have nylon rollers