Save time when installing aftermarket speakers. Front Door Speaker Adapter for 6x9 speakers. Rear door speaker adapter for most 6" to 6.75" speakers. Made specifically for most 6", 6.5", 6.75" rear door speakers. Speeds up installation time. Made from high grade plastic for a long lasting secure fit and corrosion resistance. Speaker wire harness to plug into the vehicle's factory speaker wire connector. What's Included: For 4 speakers: 1. 2 pairs of speaker adapter (4 brackets) 2. 3 pairs of speaker wire harness (4 speaker wire harnesses) Compatible Vehicles: Made for 2016-2020 Nissan Titan