[Fitment]Behind Seat Speaker Brackets fit for C10 1973-1987. [Design]Our behind seat Speaker brackets fit perfectly in your cab corner. Fit 6x9 speakers.excellent performance and durable.Easy to install, Direct installation with double-sided tape or bolts,there's no need to cut or modify your cab or doors! [Material]Made of 16 gauge steel and shipped powder coated matte black.Built to quality control standards. This is an to add a lot of sound to your cab. It allows sound to travel along the sides of the seat, rather than being muffled by the seat. [Installation]Don't cut your c10 to mount speakers. You can install it directly with bolts or double-sided tape. Seat Speaker Brackets Compatible with 1973-1987 C10 Color: black Material: steel Package Contents: 1 Pair of Behind Seat Speaker Brackets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.