The Magnadyne AS505TG speakers sold as a pair are a great addition for automotive/RV wether you need to add/replace a missing speaker in your vehicle or add a pair to enhance the sound while driving. The 5 inch speakers that are a 8 oz. magnet weight is a dual cone design that produces 25 watts maximum power handling and also has 75Hz-18kHz frequency response. In terms of measurements, the speaker has a Outside diameter of 6 inches, Minimum diameter mounting hole required 4 3/8", and 1-3/8" mounting depth.