... material quality control 3.Strict inspection on products metal zipper1) Type:#7 (other types: #3,#4,#5, #7,#8,#10)2 ... ) Eco-friendly3) Antique Brass teeth4) Closed End, Open End, 2 Way Open End, O type for overall5) Metal Top/Bottom ... years, and have been approved by our technician.◊ #7 Antique Brass metal Zipper