... ,chrome,iron,ect 2.Type: 2RS ZZ ,Z ,RS,OPEN 3.Size: 8*22*7mm deep Groove Ball Bearing: Deep ... size range and variations of structure, they are suitable for precision instruments, low noise motors, automobiles, motorcycles, and other common ... ball berings5. Reasonable price6. Technology: low vibration, low noise, high precision and durability7. OEM Service Offered, Design Service Offered, Buyer Label ...