It's adopts hot-wind & down-cyclone structure, the height of the stove tunnel, the speed and the two sides shutter are adjustable. Further it also fix advanced intelligence temperature control. Conveyor is alternative with roller or teflon mesh. 

NP-4525A has a single hot wind tunnel and prolonged tunnels for better shrinking effect. Compact Construction high efficiency. 
The use of metallic heater results in lower power consumption. 
Great airflow provides excellent heat distribution for an even shrink. 
Digital temperature controller. 
AC frequency invertor drive for variable speed of conveyor. 
Teflon coated rod/net conveyor. 
Mounted castor wheels for easy mobility.