Fitment: Rear C Notch Kit Compatible with 1989-1998 Chevy C1500 K1500 Trucks Materials: The C Notch kit is made of steel. Surface is treated with anti-rust oil on surface, prevent rust. Drop Length: 6 Inch Function: The C-Notch kit features an anti-rebound feature on the engineered frame modification reinforcement system, allowing the rear suspension to withstand additional compression or upward movement forces Installion: Mounting with screws, easy to install Package: 1 Set of C Notch Kit and accessories for installation