Good Quality Black Phospahte Drywall Screw Coarse Thread Tianjin Ruiya Internation St Co., Ltd. Base Info Model NO.：6 X 1"Diameter：#6 (3.5mm) , #7 (3.9mm) , #8 (4.2mm)Trademark：E-starOrigin：China Mainland Description Pre：Self-Drilling Screws with Wafer Head (C1022) Next：Gysum Screw
