Specification Product name: 6200zz bearing Weight: 35g/piece Material: bearing steel Outer diameter: 30mm/1.18inch Inner diameter: 10mm/0.93inch Thickness: 9mm/0.35inch Uses: suitable for all kinds of mechanical rotation, precision instruments, fitness equipment, etc. Grease lubrication limit speed: 25000rpm Oil lubrication limit speed: 35000rpm Cage and material: J steel plate stamping