Speed insert is easily removed for service or storage
Self-closing valve stops water flow when paddle-wheel is removed
Fins on sides of paddle-wheel cavity improve accuracy at low speeds and in cross flow conditions
Valve assembly is replaceable
Included high performance fairing block that reduces drag and directs smooth water over the transducer's face for excellent echosounder performance at all speeds
fairing blocks are easy to cut and will not swell or rot
