Specification Brand : Generic BulletPoint1 : Smooth shape BulletPoint2 : Each size 4mm BulletPoint3 : Precision Grade G25 Balls BulletPoint4 : Best Quality AISI 52100 Chrome Steel BulletPoint5 : Balls of 100 pieces (sometimes can be 1 to 5 pieces less) Color : Multiple colors ItemName : XYWHPGV 4mm Precision Chrome Steel Bearing Balls G25 100pcs(0bd36 95a7d 7a6e7 432a1 d9a61 9a20a ItemTypeKeyword : ball-nose-end-mills Manufacturer : XYZOOM ModelNumber : 0bd3695a7d7a6e7432a1d9a619a20a PartNumber : df8a00a2-ea2e-96447c73b7c354 ProductDescription : Solid chrome steel balls Modern furnaces with precisely controlled atmospheres and temperatures are used for heat treatment to ensure uniform hardness and adequate microstructure for each steel ball. Ball hardness is controlled within the range of 60-63 HRC measured in parallel flat surfaces. Bearing balls are used in automotive applications, for semi-precision bearings and in commercial applications. Other applications for steel bearing balls include bicycles, drawer guides, door locks. Specifications: Hardness: 60-63 Material: High Carbon Chrome Bearing Steel (GCr15) Be careful with rust, store in a dry place. Conditions high humidity or prolonged outdoor time may cause oxidation. ProductSiteLaunchDate : 2023-11-27T09:22:29.314Z Size : L Style : Manual UnspscCode : 31171500