?????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 LEADAZO FREEPass 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 controlledISO1400:2002 We promise that our products are in line with National Environmental Policies and International Environmental requirementsSA8000 We promise to undertake social responsibility and staff safeguarding based on international conventionOEKO-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