The Evac-u-Trap is a totally disposable canister, lid, mesh filter and gasket designed to replace the present canister and filter in your central vacuum pump. To remove this canister, screw on the lid and segregate with your contact amalgam for recycling. The infectious material is sealed in the canister where it cannot spill or contaminate the workplace. Nothing needs to be cleaned and you can be assured that you have minimized all contact with infectious material. 8/Box