... for Heat Preservation System 1) Standard:DIN, ISO, JIS, GB 2) Material:Steel, Iron, PP 3) Diameter:8-10mm Dowel nail for ... Heat Preservation System1) Standard: DIN, ISO, JIS, GB2) Material: steel, stainless steel, PP(Plastic), iron3) Diameter: 8 ... -24cm, as required5) Slot:6) Head:7) Thread:8) Point: sharp point9) Finish: plain, zinc, black ... ,The best service" Dowel nail for Heat Preservation System