This is a class 3442 750 N concrete cast certified 16 mm pipe is PP plastic, elastic, non-flammable, LSZH certified electrical installation pipe. The color is dark grey. Inside the pipe there is an A-class LSZH coax antenna cable. The pipe has markings every meter. The pipe is color coded. 16HF-A COAX HF is designed for the transfer of video and audio. The wave series pipe is designed for normal conditions like detatched housing and rowhousing. The pipe has a regular ridged structure that's designed for low friction. In the lower parts of a roofs upper layer the pipe slides smoothly and won't get caught in the structure. The pipe itself won't release toxic gas in a fire but the PVC coating will so the product isn't fully LSZH and you should check compatibility with the building planner. 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 for the cables are -15°+70° and -25°+90° for the pipes. The regular package size is a 100 meter plastic wrap package.