Rubber foam pipe / tube for solar energy ,Air-condition system . B2 class... ... Insulation MaterialsPlace of Origin: China (Mainland)Material: Other SpecificationsRubber foam pipe / tube for solar energy ,Air-condition system . B2 ... 500 or 1000 Length(mm) :10,000 or 20,0002) Pipe : Thickness(mm): 15-30 , Inner dia(mm) 16-89 ... laps over the packing, until the thickness needed Rubber insulation tube/pipe