300 1/8" 420 stainless steel bearing balls

Grade 25  AISI type 420 stainless steel balls afford the advantage of maximum hardness (50 Rockwell C ) and resist corrosion from alcohol, ammonia, food environments, fresh water, many petroleum products and organic and some mild acid environments. 420 stainless steel is a high carbon martensitic stainless steel and is often used in dental and surgical instruments, cutlery, pump shafts, plastic molds and dies, steel balls, and various hand tools.