Upgrade your precision engineering and mechanical projects with this comprehensive 620-piece metal ball assortment from Oingoo. This versatile set includes six different sizes of precision balls ranging from 3/32 inch to 1/4 inch, making it perfect for various applications in bearings, mechanical assemblies, and technical projects. The metal construction ensures durability and smooth operation, while the precise sizing offers reliable performance across applications. The set includes multiple pieces of each size - 1/4 inch, 7/32 inch, 3/16 inch, 5/32 inch, 1/8 inch, and 3/32 inch balls - giving you plenty of replacements and options for different projects. Whether you're working on machinery maintenance, custom builds, or technical repairs, this extensive collection provides the variety and quantity needed for professional-grade results. 6 size precision steel balls assortment kit 1/4"(6.35mm) 100PCS, 7/32"(5.55mm) 100PCS,3/16"(4.763mm) 100PCS,5/32"(3.969mm)100PCS, 1/8" (3.175mm) 100PCS,3/32"(2.381)120PCS.6 sizes, a total of 620PCS, packed in a box. Product name:Stainless Steel Bicycle Bearing Balls Precision Balls. Product specifications:6 size precision steel balls assortment kit 1/4"(6.35mm),7/32"(5.55mm),3/16"(4.763mm),5/32"(3.969mm),1/8" (3.175mm),3/32"(2.381). Product material:Precision steel balls are made of 304 stainless steel, with high precision,smooth surface, rust prevention, corrosion resistance, wear resistance and exquisite appearance. Widely used in:Bearing Balls are Widely used in bicycles,casters,door locks,drawer slides and auto parts,etc. Product packaging:1/4" 100PCS + 7/32" 100PCS + 3/16" 100PCS + 5/32" 100PCS + 1/8" 100PCS + 3/32" 120PCS；6 sizes, a total of 620PCS, packed in a box.