Sturdy Welding tape, which is located on top of the welding wire and prevents the bag from sticking to the welding wire. Suitable for Lava v.100-v.300 Premiumline machines with 2 welding seams. Note: Changing the welding tape is easy to do yourself in Lava vacuum machines. In many other vacuum ions, the machine must be delivered for maintenance. This should be taken into account when purchasing the machine. When buying welding tape, be careful how many welding seams your machine makes Changing the Teflon tape: Unplug the power cord from the wall Remove the clips on the sides and pull off the old welding tape Glue the new welding tape in place and put the side brackets in place