... PU spare parts for heating system 1.material-- rigid PU high elasticity 2.technology--PU foaming rigid foam parts for heat insulation, ... , Ozone resistance etc.4, Packing: plastic bag or carton box according to your requirements.5, Application: Automotive, Industrial, Medical ... products are qualified after all products finished.3,Quality control of package3,We all use Double-corrugated rigid kraft ...