ANSI B16.5 Class 150 slip-on flange 1.type:WN, SW, SO, BL, ... : A105, Rst37.2, Stainless steel ANSI B16.5 Class 150 slip-on flange ANSI flange1.Pressure: Class 150, 300, 600, 900, 1200, 1500 ... Pallet7.Surface treatment: Rust-preventative oil, Black painted ANSI B16.5 Class 150 slip-on flange