550/510pcs Ball Bearing Swivel Metric Precision Chrome Steel Screw Bicycle Cycling Slingshot Balls Replacement Assortment Kit

Package include 80pcs 2mm 80pcs 2.5mm 50pcs 3mm 50pcs 3.5mm 50pcs 4mm 50pcs 4.5mm 50pcs 5mm 40pcs 5.5mm 40pcs 6mm 30pcs 7mm 30pcs 8mm 1pc PP Plastic Box Only the above package content, other products are not included.  Instruction: 1. The product has a rigorous structure, high hardness, durability, and no deformation. Corrosion resistance, high hardness, can be used for a long time. 2. The surface is smooth and round, without residual burrs, cracks and chips. 3. Widely used in industries such as bearings, airplanes, motors, automobiles, driving lights, ships, air conditioners, rockets, refrigerators, trains, etc. 4. Chrome steel balls provide precise geometry and fine surface finish, which makes them particularly suitable for bicycles, wheels, drawer slides, locks and many other equipment applications. Features : 1. Strict manufacturing standards, professional manufacturing technology, complex and sophisticated production process, to create high-quality products with high cost performance. 2. Carefully select raw materials to ensure that every step of the product production process reaches an excellent level. Dear friend, you can buy with confidence. 3. Products: 100% brand new, industrial quality, high quality, durable. 4. Very high practicability: the product has clear installation technology, easy operation, and is a powerful helper in your life. 5. It has a wide audience. It is a powerful instrument for businessmen, engineers, farmers, contractors, construction workers, maintenance workers and other personnel. It is a practical tool for all families and factory workshops. Note:  1.Please allow 1-3mm errors due to manual measurement.  2.Due to light and screen setting difference, item's color may be slightly different from the pictures. Please understand.