... .Size:RD6 - RD42 Usually 3.Length:50 - 128 Name:Stainless Steel CouplingMaterial:Carbon steel,Stainless Steel 304/316,or other steelSize:RD6 - RD42,M6 - M42 ... in anchors,tie wire anchors,hex coupling nuts,chemiacal anchor,hex long nut and round coupling nuts and related products.We are ... overseas customers based on mutual benefits. RD12 - RD42,M6 - M42 Stainless Steel Coupling