... coils it passed SGS 1, material of metal spiral binding wire: high quality nylon coated wire2, color of our metal spiral ... you want 3, It is used for notebook, diaries, calendars, catalogue ect., 4, nylon coated spiral binding wire withstand extrem temperture5, we ... various problemThe specification of metal spiral coilssize(inch)diameter(mm)wire gauge(mm)1/4"60.85/16"80.811/32 ...