W-Series Double Foot Sealers are ideal for sealing thicker materials. Available in 12", 18", and 24" lengths with a 5mm seal, the W-Series foot sealers are capable of sealing materials up to 20mil total thickness. Equipped with a single and double sealing selector switch provides flexibility of sealing various types of materials. Depending on the thickness of the material, the user has the choice of 1 or 2 elements for top and bottom heating. Sealers are equipped with a steel frame for added safety and stability. A height adjustable working plate is also included. The manufacturer's replacement kit includes two elements. A taller stand and tension rod is also available adding 10" in height. Working height is 30 1/4" but the extended standing tube provides a 42 1/2" working height. Easy to Operate: Set the timer. Insert the bag between the two sealing bars and press down on the foot board. Hold down the foot board for an additional 2-3 seconds after the timer light goes off to set the seal.