delrin zipper open-end, all kinds of zippers: nylon, metal, delrin, plastic, rhinestone, both finished zipper and long chain... Nylon: #3,#4, #5,# ... non-lock, pin-lock, auto-lock, semi-autolock, L-type and Invisible zipper , woven type, water repellentResin/Plastic: #3,#4,#5 ... plating teeth (gold teeth, silver teeth, rainbow teeth), common teeth and thin teethMetal: #3,#4,#5,#7,#8,#10, finished zipper ...