Features:_x000D__x000D_With polished smooth surface, it works well with high efficiency causing low noise. _x000D_High temperature resistance, able to operate at a temperature range of 0-120 or so. _x000D_Adopting premium bearing steel material, solid enough for a long term use. _x000D_Wide applications in many fields: industrial machines, cars, ships, household appliances, health care system, etc. _x000D_With 10 pcs in package, you can keep them for spare or just substitutes for those old ones, all is okay. Very practical in our daily life. _x000D__x000D_Specification:_x000D__x000D_Material: Bearing Steel _x000D_Type: 698ZZ _x000D_Color: Silver(Shown as pictures)_x000D_Inner Dia: Approx. 8mm/0.31inch_x000D_Outer Dia: Approx. 19mm/0.74inch_x000D__x000D_Thickness: Approx. 6mm/0.23inch _x000D_Working Temperature: 0-120 _x000D_Quantity: 10 Pcs_x000D_Weight: Approx. 70g_x000D__x000D_Packing List:_x000D_1 x 10 Pcs Ball Bearings 1With polished smooth surface, it works well with high efficiency causing low noise. 2High temperature resistance, able to operate at a temperature range of 0?120 or so. 3Adopting premium carbon steel material, solid enough for a long term use. 4Wide applications in many fields: industrial machines, cars, ships, household appliances, health care system, etc. 5With 10 pcs in package, you can keep them for spare or just substitutes for those old ones, all is okay. Very practical in our daily life.