Base plate for fastening to existing galvanized C-profile rails to counteract stress corrosion between the C-profile and the pipe. for pipe clamp: DRS ... and for C-profile rails: 16 - 17 mm slot width and 30 mm width Dimensions (approx. dimensions) W x L: 35 x 23 mm for pipe Ø: 14 mm Material: stainless steel, material no. 1.4301, 1.4303