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 a 50% pull friction resistant coating. Additionally, inside the pipe there is a string attatched to make pulling wires into pipes easier. The pipe has markings every meter. 16HF -S-SC ICTAF Smooth series pipe is designed for demanding conditions eg. apartement and public buildings to withstand concret casting. The pipe is built so that it won't stretch but is still elastic. Installation for dividing walls and concrete grids have been made easier by making the pipe slide easier. In a fire the product won't produce toxic gas or smoke and the product is LSZH. The product suits public building needs. 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°. The regular package size is a 100 meter plastic wrap package.