This is a class 3442 750 N concrete cast certified 20 mm pipe is PP plastic, elastic, non-flammable, LSZH certified electrical installation pipe. The color is dark grey. The inside of the pipe has a coat that reduces friction 50% and a string that eases pulling wires and conducters into the pipe. The pipe has markings every meter. The 20HF-A- SC ICTAF wave series pipe is designed for normal conditions like detatched housing. The pipe has a regular ridged structure that's designed for low friction. In the lower parts of a roof upper layer the pipe slides smoothly and won't get caught in the structure. The pipe won't release toxic gas in a fire, is LSHZ certified and compatible with public buildings. The pipes are up to IEC/ EN 61386-22 IEC/EN 61386-23 IEC 61034-2 EN 50267-1 EN 50267-2-2 standards, PBDPO free, environmentally friendly, Low Smoke Zero Halogen and environmentally friendly in flammable situations. Use and handling temperatures are -25°+90° for the pipes. The regular package size is a 100 meter plastic wrap package.