Hex Head Delf Tapping Screws With Washer 1)Material:Copper 2)Standard: ... treatment, black, power coating, nickle, ect Place of Origin Xiamen China(mainland) Brand Name XHF Materialcarbon steel,stainless steel,brass,aluminum Size ... :Room2 309 , World Trade Building B# , Siming District , Xiamen Fujian, China We will be please to give a best service ,you ...