Shrink Tunnel Machine Heavy Duty Model SPST-300,SPST -120, SPST- 100 & SPSWM -360 adopts hot-wind & down-cyclone structure, intelligence temperature control and AC variable speed regulation. There are two optional conveyors, including Teflon belt type and roller type. Shrink tunnel are applied to heat shrinkable film such as LD,PVC, POF, PP etc…