Clamco 7221 heat shrink tunnels are a great choice for tough, dependable long-life performance in continuous production environments. Constructed of heavy-gauge structural steel, Model 7221 features a heavy-duty blower, variable air velocity control, digital heat control, and a variable-speed roller conveyor that instantly adjusts between live and dead. The Model 7221 production shrink tunnel combines advanced design precision with tough, time-proven features-expertly crafted by Clamco, the industry’s respected name for steadfast reliability and value.