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 -20-200 or so. _x000D_ Adopting premium carbon 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: Carbon Steel _x000D_ Type: 626ZZ _x000D_ Color: Silver(Shown as pictures)_x000D_ Inner Dia: Approx. 6mm/0.23inch_x000D_ Outer Dia: Approx. 19mm/0.74inch_x000D_ _x000D_ Thickness: Approx. 6mm/0.23inch _x000D_ Application Temperature: -20-200 _x000D_ Quantity: 10 Pcs_x000D_ Weight: Approx. 72g_x000D_ _x000D_ Packing List:_x000D_ 1 x 10 Pcs Ball Bearings