stationery book binding spring clip/file binding spring binder material: iron/plastic color: nickel/white, grey, transparent, etc. any color needed size: 202mm, 199mm, 160mm packing: standard export carton item Rivets distance Packing(pcs/ctn) remarks SC202QSL 62MM 1000PCS QSL: totally made of plastic SC202SLTH 113MM 1000PCS SLTH: plastic with metal spring SC199WJ 113MM 1000PCS WJ: metal SC160WJ 100MM 500PCS