1/4 inch 6.35mm steel ball 1.material:AISI1010-1015 2.size:6.35mm,4.76mm.5.55mm,7.938mm,9.525mm 3.grade ... /G1000 Name1/4 inch ,6.33mm carbon steel ball for curtain made in ChinaSize6.35mm,4.76mm.5.55mm,7.938mm,9.525mmGradeG1000Quality ... .your quotation and cooperation are welcome! 1/4 inch,6.35mm carbon steel ball for curtain