The TurboChef NGC3017 rear waveguide kit includes a gasket for the designated waveguide section in compatible commercial speed ovens. The waveguide directs microwave energy through the oven's internal transmission path, while the gasket provides a sealing interface at the assembly connection. Together, these components form part of the rear microwave energy delivery arrangement. https://partsfe.com/ngc3017-turbochef-rear-waveguide/1-NGC3017.html