Specifications: sbs zipper ,nylon zipper,metal zipper,plastic zipper 1" Specifications of SBS finished products are as follows: Nylon Zipper: 3#, 4#, 5#, 7#, 8#, 10# Metal Zipper: 3#, 3.5#, 4#, 4.5#, 5#, 8#, 10# Plastic Zipper: 3#, , 5#, 8#, 10#, 20#, 30# Invisible Zipper: 3#,4#,5# 2" Quality characteristics of SBS products: NICKEL FREE (Slider or metallic parts are NICKEL free) NO LEAD AZO FREE Pass needle-detector (Slider and metallic parts are required to be ferromagnetism free) 3" Our company's guarantee system: ISO9001:2000 the quality of all products are controlled ISO1400:2002 We promise that our products are in line with National Environmental Policies and International Environmental requirements SA8000 We promise to undertake social responsibility and staff safeguarding based on international convention OEKO-TEX standard 100 we produce nontoxic products in the light of European Environmental Standard, SGS,ITS,MTL,TUV,OEKO-TEX Trusting guarantee issued by international renowned tests