Channel rail adaptors type CRA for the fixing of ACT clamps of the Twin Series according to DIN 3015, Part 3, in conjunction with many common profile rails and installation rails by other manufacturers, including STAUFF, Halfen, Hilti and Unistrut. Manufactured from V4A stainless steel (material key: W55) with improved corrosion resistance by the avoidance of metallic and non-metallic contamination during production, machining and storage. STAUFF ACT clamps: Anti Corrosion Technology. Reduce crevice corrosion on the tube.