Frames: Formed type 304 or 316 stainless steel channel side frames with fully welded square tube cross braces, flat bars and UHMW-PE snap-on wear strips. Belting: Various styles of plastic modular designs or stainless steel construction Belt Return: Ball-n-Sokit tm rollers, solid Lubra-Tuf tm rollers or UHMW-PE wear-strips. Supports: 1-1/2" stainless steel square tube with adjustable all thread or round pipe feet.