Flat Mount KitFor the ultimate in custom appearance, use our exclusive flat-mount option. This kit mounts your unit into a flat panel, giving your boat a beautiful, sleek glass helm. Includes hardware, installation instructions and a template.This type of mounting requires full access to the back of the mounting surface, and the ability to precisely cut or fabricate the mounting surface to complete the installation with the desired appearance. Professional installation by a technician or company with dashboard modification experience is highly recommended.Compatiblie with:echoMAP(TM) 50sGPSMAPA(R) 527GPSMAPA(R) 527xsGPSMAPA(R) 547GPSMAPA(R)547xsWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.