The DS18 Hydro All Elements Series is comprised of many components and accessories to make any build imaginable come to life. With over 50 marine grade compliant products, we have whatever you need for your ATV, UTV, Side by Side, Jeep, Motorcycle, Boat or anything in between. We invite you to get as creative as possible and make the loudest, clearest system on any terrain, water body, or air. Universal fit, its perfect for mounting towers/pods on roll bars and cages - perfect for wakeboard speakers! This HYDRO Universal Flat Mount is perfect for all marine applications- fits all pole sizes!