Materials :Carbon Steel, Stainless Steel, Duplex & Super Duplex Steel, Alloy Steels (P5,P9,P11, P22), Inconel, High Chrome High Nickle & Incolloy Etc. (any Ferrous Material), Stud Diameter : Standard Size Is Circular For Extended Portion 0.5” (12.7MM) (can Be Changed As Per Customer Requirement)