Remarks: Rust resistance: general, not rust in water Hardness:non-magnetic¡Ü26 HRC magnetic¡Ü50 Application: librating polishing, aluminium casting, stainless steel workpiece, etc. Have effect of 90¡ã dead angle light libration equal to 10 times of steel ball Specification:§¶3.5X5.5 §¶4.5X7 nonstandard products made to order
