Galvanized flat head drywall screws; OEM from China; Certification:ISO14001:2004 ISO9001:2008 SGS StandardISO,GB,DIN,JIS,ANSI,BSW, ... ,Heat dipzinc, Chromate ,Electro Painting etc.Certificate SGS, ISO9001:2008, ISO14001:2004Carton size30X20X20cm or according client’s requiresWe can supply you ...