... quailty black Drywall screw 2.size of the screw:M1.6-M9.5 3.surface of screw:zp,hdg,black,oxide ... 4.ISO9001:2008 name: high quality black Drywall screwFinish: galvanize ... customers and produce according to customer requested.standard of black Drywall screw: JIS,BS,GB,ISO,DIN,AISIsize ... and box and cantons.We will ship the black Drywall screw within 3-5 working days ...