... nail for Heat Preservation System 1) Standard:DIN, ISO, JIS, GB 2) Material:Steel, Iron, PP 3) Diameter:8-10mm Dowel nail for ... : 8-10mm, as required4) Length: 7-24cm, as required5) Slot:6) Head:7) Thread:8) Point: sharp point9) Finish: plain, zinc ... :"Fast delivery time, Reasonable price,The best service" Dowel nail for Heat Preservation System