The upper jaw constant foot sealers have a 3mm wide mesh seal on the upper jaw only. The heat this sealer produces is very concentrated. They are recommended for difficult applications that are not suited for standard style sealers. Each unit is equipped with a temperature controller, a beeper to notify operator to release pedal and PTFE Non Stick coated sealing bars. Options that are available include hot stamp imprinting for printing date, time, codes, etc., heavy duty work tables, height extender, adjustable angle, and an extended foot pedal.