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. What's Included: For 4 speakers: 1. 2 pairs of speaker adapter (4 brackets). Compatible Vehicles: Made for Nissan: 2016 2017 2018 2019 2020 2021 2022 2023 Titan and 2022-2024 Frontier