... resistance gene 4 low&stable thermal conductivity 5 closed cell foam structure,water absorption rate is low(The wall thickness ... goodFormaldehyde ExclusiveAmmonium nitrite ExclusivePolyethylene Exclusivegdflex insulation pipe available length:1.8m,2m is standard,other length is required customer. ... ,60mm,76mmthickness:10mm,13mm,20mm,25mm,32mm,50mm EPDM flexible elastomeric thermal insulation tube