this panel meter features a 3 digit lcd with 12.5mm (0.5'') digit height in a low profile housing. fitted inside a threaded body which allows easy mounting of the product through a 32.5mm (1.28”) hole, this unique enclosure is ideal for quick mounting. a rubber seal provides waterproof protection to ip67 / nema 4x when fitted between the meter and mounting panel. connection is via pins.