The 2-Piece Snap-On Compression system may be used as a perimeter flashing in a Mule-Hide PVC, TPO, or EPDM roofing system. The system consists of a 24-gauge Galvalume® base and a snap-on metal cover. The 2-Piece Flex Snap-On Compression system is made with a flat face to help it conform to a radius edge. The system consists of a 24-gauge Galvalume® base and a snap-on cover notched in 3” intervals to easily snap over radial surfaces.