This replacement kit is for use with SealerSales W-450T Foot-Operated Double Impulse Sealer. Replacement Kit Includes: (2) 5mm wide heating element, (2) 1/2" 6mil PTFE adhesive, and (2) 12" 5mil PTFE cover roll. Note: We recommend replacing the bottom PTFE adhesive strip (1/2" wide sticky backed-remove the liner) every time the element is replaced. Place the PTFE adhesive strip under the element on the base of sealer.