This product is either discontinued or we cannot get that from suppliers.
Brand: Garmin, Model: 010-12021-00, Type: Mount, Colour: Black, Compatible: GHC 20 Marine Autopilot Control Unit / GMI 20 / GNX 20 / GNX 21 / GNX Wind / GNX Wireless Sail Pack 43 / GNX Wireless Sail Pack 52 / GNX Wireless Wind Pack.
Flush or flat mount your GMI 20 digital marine instrument display or GHC 20 marine autopilot control unit with this flush-mount gasket.