SIDEVIEW MIRROR GLASS 12-VOLT HEATER GRID Universal Automotive Sideview Mirror Glass 12 Volts Heater Grid, AKA Heat Element or Heater Pad. The heater grid is self adhesive on the side that sticks to back of the mirror glass, and has 2 prong connectors to connect the electrical wire to it. FITMENT: This heater grid can be installed on a mirror glass that measures 140 X 70 mm (5 ½ X 2 ¾ inch) or less. Check the pictures that show the shape, size, and position an type of the connectors of this heater grid and compare to the size and shape of mirror glass on vehicle to choose closest shape and size heater grid. This heater grid is interned to be used on vehicles that already have the Heated Mirror Glass option from factory, as wires with prong connectors that feed electrical power to the mirror glass heater must be available on mirror assembly. INSTALLATION: Since this item is general purpose, some modification may be necessary to the plastic backing plate that holds the glass in order to properly install and use this heater grid. Note the location or position of the heater grid electrical connector prongs may not match the location of the holes on the plastic backing plate and possibly creating 2 holes may be required. View our pre-order and Installation pages to help you identify what parts, tools, and type of glue or adhesive you may need to best suit your application, and also to get assistance with proper installation of the mirror glass.