Kit includes hard anodized, billet aluminum inner and outer flanges and stainless steel hardware. This flange is a PnP replacement for the FD RX-7 OE firewall grommet on the emissions (engine) loom. No drilling or cutting required for installation. Kit is available as a flange kit only or with a 24-61 connector kit (plug and receptacle) including back shells and Raychem shrink boots. Other size 24 connector kits available upon request.