General description 12 size precision steel balls assortment kit containing a total of 600 pieces: 90 pcs of 1mm, 80 pcs of 2mm, 80 pcs of 2.5mm, 50 pcs of 3mm, 50 pcs of 3.5mm, 50 pcs of 4mm, 50 pcs of 4.5mm, 50 pcs of 5mm, 30 pcs of 5.5mm, 30 pcs of 6mm, 20 pcs of 7mm, and 20 pcs of 8mm. Made of 304 stainless steel, these balls feature uniform size, high wear resistance, high precision, and a smooth finish with no burrs, providing an exquisite appearance. They are widely used in various applications including auto parts, motorcycles, bicycle bearings, casters, and drawer slides. Additionally, they can be used as mixing balls for stirring paint and other materials. Technical specifications Material: 304 Stainless Steel Size of storage box: 10.01 x 3.99 x 1.30 cm Measurement allowed error: +/- 1-3 cm Other information Storage box packaging with steel balls sorted by size for easy identification and storage. Note: Due to different production batches, the plastic box style may vary in