Inoac copper pipes - double
The Inoac standard copper pipes are wrapped with polyethylene resin. Directly around the pipe, on the insulation layer, there's a 2nd layer hard polyethylene foam with an excellent heat resistance. (metric) fire retardant pipes are insulated with fire retardant polyethylene foam. These are also available as kits, including halogen-free electric cables. Pipes with fixed length are straight copper pipes with a wider end at one side. Lastly, there are extra insulated pipes with a thicker insulation layer of 15 mm.