... to 30mm, 3.Copper or stainless steel facing treament. 23 gauge Micro PinsFeatures and benefits:1.MEITE's P630 23GA Micro ... Pins is ideal for high-grate upholstery.2.The diameter is 0.63mm,that is 23GA, from10mm to 30mm in ... ,P625,P630Facing Treatment:Iron in Copper Facing and Stainless Steel.Diameter:0.63mm,18GAPacking: 10000pcs/box 48boxes/ctn 23 gauge Micro Pins