Wedge wire is the filter media which are made from shaped wire. The profile / surface wires are accurately aligned and then welded to the support rods mostly by automatic resistance welding. Both the profile and the support wires can be with certain wedge shape or other section shape such as water drop , circle, or keystone.
316 (1.4401), 316L (1.4404), 304, 304L stainless steel are the among the standard material for wedge wire filter elements.
Other exotic materials are also available as request, such as 904L, Hastelloy C276, Hastelloy C22, etc.