China Factory Direct Sale Vacuum Flange Stainless Steel Flange Kf16 Blind Flanges Used for Semiconductor Cdfl361, Find details about China Stainless Steel Plate Flange, ANSI B16.5 Flat Flange from Factory Direct Sale Vacuum Flange Stainless Steel Flange Kf16 Blind Flanges Used for Semiconductor Cdfl361