... -1015,AISI1045,AISI1085 G28-G1000,2MM-60MM),and chrome steel balls(AISI52100 G40-G1000,2MM-60MM) and stainless steel balls(AISI304,316,420,440 G100-1000 ... many province in China and very popular in abroad market such as Germany,Italy,Brazil,Canada and korea. 6.35 steel balls for curtain