black Drywall screw C1022 material Dia:3.5, 3.9, 4.2 , ... ,25,32,38,45,48,50,60... zinc plated & phosphated DRYWALL SCREWRaw materialC1022Diameter3.5mm,3.9mm,4.2mm,4.8mm……Length1 ... /box,500pc/box,10kg/carton,20kg/carton,25kg/carton Black Drywall screw