Plastic Bearing Pulley, Plastic Products manufacturer / supplier in China, offering Factory Supply Waterproof Rustproof Size 6*22.8*9.5*20.4mm Plastic Bearing Pulley, White POM Plastic Roller Wheel Size 8*29.5*9.7*25.5mm Superior Bearing Pulley, Nylon U-Type Belt Factory Size 6*22.8*9.5*20.4mm Plastic Bearing Pulley and so on.