JBL 8138 Ceiling Mount Speaker (for Backcan Mounting)Priced individually, but sold in packs of 4. The 8138 is an 8" ceiling speaker designed for use with a pre install inceiling backcan, resulting in highfidelity performance at a costeffective price point. The 8138 is ideal for a wide variety of commercial sound applications from restaurant and retail to professional offices and reception areas. Features Stylish, contemporary appearance enhances any decor. Clear sound from an 8 inch dualcone full range