2 Pcs Deep Groove Ball Bearings Deep Groove Bearings Skating Mechanical Transmission Bearings 12x28x8mm

Size:Inner Dia.x Outer Dia.x Thickness:12x28x8mm Material: bearing steel, durability and resistance to deformity under heavy loads.Rust and corrosion resistant,washable. Hardness 60-62°, high speed, low noise, high precision. Closed with metal shields to protect the bearing from dust or any possible contamination. Applicable to: all kinds of mechanical transmission, supporting motors, precision instruments, telecommunications equipment doors and windows pulleys, fitness equipment, toy car models, skateboard roller skating, fishing gear, aircraft model equipment, sewing machinery, household appliances, medical equipment, etc.