This BlackHawk radio pouch will carry any hand held radio including Motorola MX 300. It is held securely to the belt by belt loops or Alice clips. The radio itself is held securely in place by an inside hook and loop strap and then covered by an outer flap. The rigid antenna has its own cutout for proper use and extension. There is a drain hole provided for amphibious use. Made of 2 layers of 1000 denier NyTaneon nylon. Internal elastic retention capability. Dimensions - 8" x 3 3/8" x 1 5/8".