_x000D_ 12 size precision steel balls assortment kit contains: 90pcs1mm 80pcs2mm 80pcs2.5mm 50pcs3mm 50pcs3.5mm 50pcs4mm 50pcs4.5mm 50pcs5mm 30pcs5.5mm 30pcs6mm 20pcs7mm 20pcs8mm._x000D_ Made of 304 Stainless Steel. Uniform size, high wear resistance, high precision, smooth surface, no burr, exquisite appearance._x000D_ Widely used in auto parts, motorcycles, bicycles bearings, casters, drawer slides etc. It can also be used as a mixing balls. Used to stir paint, nail polish, etc_x000D_ The surface is coated with a small amount of grease to reduce friction when the bearing rotates and prevent corrosion and rust.Will reduce the damage to the machine and extend the service life._x000D_ Storage box packaging. steel balls are sorted by size and stored in compartments of the box. Easy to identify and store._x000D_ _x000D_ Note:due to different production batches, the plastic box style is random_x000D_ Colour:Silver_x000D_ Material:Stainless steel_x000D_ Size:10.01x3.99x1.30 cm_x000D_ _x000D_ Package Contents:_x000D_ 600 * 12 Size Stainless Steel Precision Steel Balls_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_