Unirac Standoff's are available as "Raised Flange, Zinc Plated Steel", "Flat Top One Piece Zinc Plated Steel" and "Flat Top Two Piece Aluminum" in 3, 4, 6 & 7" lengths in each type.
Unirac Flashings are available as galvanized steel, or aluminum with all-metal, or rubber collars to accomodate any roof material or application.