Carbon Steel,Alloy Steel,Low Temperature carbon Steel, Stainless Steel, Duplex Stainless Steel,Super Duplex Stainless Steel,any other special materia • Oval Flat Body Bonnet Joints for 150 Ibs. • Male Female Body Bonnet Joints for ratings ≥300 Ibs • RTJ Joints on request. • RTJ Body Bonnet • Joints for ratings ≥ 1500 Ibs (standard)