... 1.Certificate: ISO9001:2008, ISO14001:2004 2.Support: Senior workers bulk nails /duplex nail/common nails Material Iron,stainless steel,copper ... ,JIS ISO ,BS,ANSI...ETCSurface Finish zinc plate,plain finish,black oxideNormal M1-M8Head recess philips ,square ,H.WFPacking Carton ,small ...