PP Plastic Ball Bearing ID 6-40mm Polypropylene Corrosion Resistance Waterproof
PP is polypropylene, white translucent waxy solid plastic. Type:Plastic Ball Bearing. The inner and outer rings and the cage are made of PP, and the rolling body is made of glass balls. The ball is made of high-strength glass ball, which rotates more smoothly and is more wear-resistant.