Features: Our 2-10mm steel balls conform to the standardized metric system. If you apply oil to it, it can improve lubrication and prevent corrosion and rust. This set of metal balls is packed in a high-quality transparent box with partitions for easy classification and use. You don't have to worry about mixing them up. 13 sizes of parts can meet the needs of most bearings in your life. You can repair it at home without going to a repair shop. Can be used as ball bearings in bicycles, agitators in spray cans, wheels, drawer slides and door locks. It can also be used to clean glasses, decanters, pots, kettles, bottles, thermos and kettles, etc. Specifications: Material: bearing steel Size: 2-10 mm Color: Silver Quantity: 540 Packing list: 80 x 2mm 80 x 2.5mm 50 x 3mm 50 x 3.5mm 50 x 4mm 50 x 4.5mm 50 x 5mm 30 x 5.5mm 30 x 6mm 20 x 7 mm 20 x 8 mm 15 x 9 mm 15 x 10 mm 1 x storage box NZ stock ready for immediate dispatch