【Exquisite Material】: All bearing balls are made of high-quality stainless steel with smooth polished surface, corrosion resistance, rust resistance, strong toughness, strong oxidation resistance, and can maintain high performance in harsh environments, and durable.

【Function of Steel Ball Bearings】: A ball bearing is a rolling bearing used to carry loads, reduce friction and position movement. Ball bearings use stainless steel ball bearings to reduce surface contact and friction between moving planes.

【Easy to Use】: These ball bearings stainless steel used to installed between the inner and outer rings, which can be used to reduce the friction when the bearings rotate, thus reducing the speed of the ball bearings and extending the life of the machine.

【Wide Range of Applications】: The stainless steel balls set is an ideal tool for bicycles to replace front and rear wheel bearings and bottom brackets, keeping the pedaling process smooth and efficient. Widely used in bicycles, motorcycles, auto parts, bearings, casters, drawer slides, door locks, home furniture, aerospace, instrumentation, and many other applications.

【Package includes】: You will receive a total of 580 pcs bicycle ball bearings, including 50 pcs 1mm,50 pcs 1.5mm,50 pcs 2mm,50 pcs 2.5mm,50 pcs 3mm,50 pcs 3.5mm,50 pcs 4mm,50 pcs 4.5mm,50 pcs 5mm,30 pcs 5.5mm,30 pcs 6mm,20 pcs 7mm,20 pcs 8mm,15 pcs 9mm,15 pcs 10mm. All steel ball bearings are packed in a sturdy plastic storage box with multiple different compartments, stored by size, easy to store, transport and use.