foot type double Impulse sealing sealer installs twin elements (top & bottom) for heavy duty applications. It makes 5mm seal width. Equipped with a single or double selector switch. User has the choice of using 1 element or 2 elements. This feature extends the life of the sealer and at the same time increases its versatility. By foot control, it is easier for user to operate machine by hands and get an excellent and perfect seal.