Mounting Plate for easy cut out of enclosure without being precise to match meters and keep things square allows monitoring two different voltages 2.5v-30v (CAUTION!!!! some of these have difficulty exceeding 18v and go up in smoke)using these types of meter displays: http://www.ebay.com/itm/251690868300 Meter Size: 23mm (L) x 15mm (W) 10mm (H) for the single version replacement: http://www.ebay.com/itm/171454222998 Meter Size: 48mm (L) × 29mm (W) × 26mm (H)Great for drone ground stations, solar setups or anything else that needs voltage displayedPrint and mount displays, I used glue on the rear as I wanted the plate to print quicker and the 1.5mm thickness is just short of grabbing the mounting tabs tightAdded version with thicker trim for cutouts to grab meter tabs tighter