... steel 304, 316 2. mirror polish, high polished 3.Bullet End Plug,forged pipe fittings 1.Material : Stainless steel 304, 3162. Surface ... : mirror polish, high polished3.Name:Bullet End Plug,forged pipe fittings4.specification:7/8'' Casting: investment casting ,precision ... x-ray,metallograph.Quality control: According to ISO 9001 2001 Bullet End Plug,pipe fitting