The heat shrink tester is suitable for testing the heat shrink performance of materials, which can be used for plastic film substrate (PVC film, POF film, PE film, PET film, OPS film and other heat shrink films), flexible packaging composite film, PUGU PUTIVU PUCUVANY CLLOVENY, SOLICITÀ SOLARI CELL SOLARIO E ALTRE MATERIALI CON RISPOSTA DI U CASE SHERK.