Sleeve wrapper with shrink tunnel are used to pack heavy products and for high production. The film used in this application is LDPE or LLDPE shrink film. In this machine 2 rolls of film are used and automatic un-winding system is provided for film dispensing. The sealing system is a special type knife sealer, which seals and cuts the film with uniformity and consistently, air-cooling is used for cooling the seal. Sleeve wrappers are usually combined with heavy duty shrink tunnels for better output and packaging results.