... parts for heating system 1.material-- rigid PU high elasticity 2.technology--PU foaming rigid foam parts for heat insulation,PU spare parts for heating system1 ... .2, Hardness: Between 30~90 shore A3,Property: high/low temperature resistance, oil and fuel resistance, water resistance, weathering resistance, Ozone ... can reach destinations in 3 days fastly. PU spare parts for heating system