Drywall screw 22A material Dia:3.5, 3.9, 4.2 , ... :13-150mm zinc plated & black/grey phosphated fine& coarse thread DRYWALL SCREWRaw materialC1022,C1018Diameter3.5mm,3.9mm,4.2mm,4.8mm ... /box,500pc/box,10kg/carton,20kg/carton,25kg/carton black drywall screw/galvanized drywall screw