12 size precision steel balls assortment kit contains: 90pcs1mm 80pcs2mm 80pcs2.5mm 30pcs3mm 50pcs3.5mm 50pcs4mm 50pcs4.5mm 50pcs5mm 30pcs5.5mm 30pcs6mm 20pcs7mm 20pcs8mm.<br> Made of 304 Stainless Steel. Uniform size, high wear resistance, high precision, surface, no burr, exquisite appearance.<br> 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<br> 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.<br> Storage box packaging. steel balls are sorted by size and stored in compartments of . Easy to identify and store.<br> Note:due to different production batches, the plastic box style is random<br> Colour:Silver<br> Material:Stainless steel<br> Size:10.01x3.99x1.30 cm<br> Package Contents:<br> 600 * 12 Size Stainless Steel Precision Steel Balls<br> Only the above package content, other products are not included.<br> 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.