Grinding Ball, We are providing chrome steel, carbon steel, stainless steel grinding balls Grinding BallFeatures:1) Material: AISI1005-1085, AISI52100, AISI304, 316, 420, 4402) Specifications: thorough hardened, super-fine surface available3) Size: 2 ~ 30mm, custom sizes availablePacking: Carton or steel drum Grinding Ball