The VacMaster® Maintenance Kit comes with everything you need to keep your machine running. Kit includes a Bottom Gasket, Seal Tape, and Seal Wire. Bottom Gasket ensures a constant vacuum and complete air removal. The Seal Tape covers the wires of the seal bar, so the wires don’t come in direct contact with vacuum packaging bag. Seal Wire is the part that heats up to seal the bag. Each part is made to the original specification and is easy to install. Kit is for use with the PRO350.