This Weston maintenance kit (product 08-0501-W) is O.E.M. first aid for your vacuum sealers and will help keep you up and running. Kit contains easy to install replacement parts that will work on Weston's PRO-2100 (65-0101), PRO-2300 (65-0201), PRO 2600 (65-1301-W) and PRO-3000 (65-0401-W). Included in the kit are two oval chamber seals (these help form a tight seal and therefore a good vacuum) and the bottom and top portions of Teflon tape for the seal bars (these tape portions keep the sealing wire from burning the plastic of the seal bag). Contact us with any questions you have about this item.