1) Model : SC-660 2) Application: Pocket spring mattress 3) Fine quality 4)a crown:16.7mm, 5)wire dia:1.6mm staple ... antirust, wire insideHave Fe C S P Mn Si, and a small number of Cu etc, including the content of Fe ... two kinds, one kind is made of iron, still have a kind of were of brass.Nail book needle size: 10 ... , c staples, C nails.industrial staples nails C RING STAPLE(SC-660)