DS18 FLMBPS HYDRO Universal Flat Mount Bracket for All Elements and Marine Applications (Single) – New Edition Our ultra loud DS18 PS series towers come with a standard size tower clamps that fit most applications, but for those that do not have a tubular tower need another option. The FLMPS V.2 attaches just like the standard clamps to the base of the tower, but now gives you a flat mount option that can be mounted to any solid flat surface that has proper support. These super strong clamps are sure to keep your DS18 PS series towers sturdy and stable with angle adjustment