The Bored Flanges are available in the following sizes: ISO 63, ISO 80, ISO 100, ISO 160, ISO 200, ISO 250, ISO 320, ISO 400, ISO 500. The Bored Flanges are made out of Stainless Steel. ISO Flange Series are comprised of two smooth face flanges clamped together with a combination of metal centering rings, and elastomeric O-Rings
