Cover plates type DP for the fixing of ACT clamps of the Twin Series according to DIN 3015, Part 3. 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. Combats crevice corrosion on the tube.