Humminbird IDMK RM A16 In-Dash Mounting Kit f/APEX 16 [740192-1]IDMK RM A16 In Dash Mounting Kit for APEX 16 The IDMK RM A16 is an in dash mounting solution for APEX 16 models where a rear mounted bracket solution is desired for installation. This product provides a secure fit of the APEX control head to the mounting surface and provides a clean and finished look at the helm. Features: Compatible with: All APEX 16 models Includes a reinforced, aluminum mounting bracket with stainless steel mounting hardware. 1