1/4",3/16" AISI1010 steel ball 1.material:AISI1010-1015 2.size:6.35mm,4.76mm.5.55mm,7.938mm,9 ... .525mm 3.grade:G500/G1000 Name1/4 ... AISI1010 carbon steel ball for curtain Size6.35mm,4.76mm.5.55mm,7.938mm,9.525mmGradeG1000Quality standardISO9001: ... us.your quotation and cooperation are welcome! 1/4",3/16"AISI1010 carbon steel ball for curtain