This product is a round bearing ball, which is made of stainless steel material, with good texture, safe and practical. Easy to install and use, it can be easily applied to your machine. It is a very practical accessory that will meet your needs well. Features -Color:Silver -Material:Stainless steel -Size:0.80X0.80X0.80cm/0.31X0.31X0.31in - Can reduce friction when the bearing rotates. It can strengthen the protection of the machine and prolong the service life. - Designed to reduce the damage to the machine and extend the service life, very professional and convenient. - Fit for auto parts, bicycles, valves, refrigerators, air conditioners, bearings, photographic equipment, drawer slides and many other applications. - Multiple sizes available to meet most of your bearing needs in life. - Special design and it is in fine craftsmanship. It is the best replacement for your old, broken one. Package list: 80 x 2mm Bearing steel balls 80 x 2.5mm bearing steel balls 3mm bearing steel balls 3.5mm bearing steel balls 4mm bearing steel balls 4.5mm bearing steel balls 5mm bearing steel balls 30 x 5.5mm bearing steel balls 30 x 6mm bearing steel balls 20 x 7mm bearing steel balls 20 x 8mm bearing steel balls