Detailed Product Description 1) Size: 1/2 - 24" 2) Pressure class: 150 - 2, 500lbs 3) Facing: RF / FF / RTJ 4) Material: Stainless steel, Carbon steel, Alloy steel 5) ANSI B16. 5 6) Big size flange: ASME B16.47 7)Other standards:DIN/JIS/UNI/BS/GB