Insulation pipes: 1,Certificate,ISO9001,CE,Aenor 2,For heating pex-al-pex pipe ,pex pipe Insulation pipes: Hangzhou MARK insulation pipes are available in the normal dimensions with insulation of 6mm,7mm,8mm thickness. This insulation is made of expanded polyethylene with closed-cells, which is coated by a special moisture resistant film of white color, that offers UV protection.By minimising the ...