Triple-column clamps, with pressure and double counter-trough, including zinc-nickel coated M 8 stud screw, for the correct laying of single-core cables in the bundle. For C-profile rails with slot width: 18 - 22 mm Dimensions (approx. dimensions) for cable Ø: 28 - 32 mm Material of clamp and holding plate: Steel, hot-dip galvanized in accordance with DIN EN ISO 1461 Material of pressure and double counter-trough: PP (polypropylene), halogen-free, light gray similar to RAL 7035 Material of tray insert: Steel, strip galvanized in accordance with DIN EN 10346