The Tera44 air line plug kit is for use in Tera44 axle housings that will be using an aftermarket locker (like an ARB) and requires the factory electronic locker hole to be blocked or modified for the ARB air line. The Tera44 air line plug kit includes the air line plug, o-ring, and hardware.Fits: 07-Present Jeep Wrangler JK 07-Present Jeep Wrangler Unlimited JK Details: Black Powdercoat Finish Sold Individually