Counter trough, for all U-clamps, to slide onto the clamp bracket, versatile use as a double counter trough and/or pressure trough, can be used with any U-clamp and rail without changing the clamping range. The cable diameter to be clamped corresponds to that of the U-clamp to be used. for U-clamp: B ... BA ... BU ... BF ... BW ... for C-profile rails with slot width: 11 - 12 mm 16 - 17 mm 18 - 22 mm for flat iron with material thickness t: 4 - 12 mm for angle steel, U-iron with a leg length: 40 mm and t= 4 - 6 mm Dimensions (approx. dimensions) for cable diameter: 18 - 22 mm Length L: 74 mm Material: Steel, strip galvanized in accordance with DIN EN 10346