Poly-Planar - Radio Mount Underdash/Overhead - Black - RM-10. Radio Mount is designed to accommodate today's larger front panel format Marine radios as well as older DIN style and Post mount. Made from heavy wall ABS plastic, the RM-10 has room for all the accessory cables found on the newest radios. Accepts PolyPlanar, Sony, Jensen, Marine AV and even Clarion CMD4!. Features:. UV stabilized ABS housing. Fits DIN and Post-mount Stereos. Can be installed overhead or under dash. Mounting hardware included. Accepts PolyPlanar and most other brands of stereos. Specifications:. Length - 11-15/16" (302mm). Width - 10-7/16" (265mm). Height - 4-3/8" (111mm)