Levitron Smartlock (rectangle) Drok Meter Box for Drok 80-300V 100A meterYou are buying a 3D printed plastic box, a Levitron Smartlock outlet faceplate, and 4 screws to secure the faceplate. No other hardware is included. The 1 2" has a 22mm hole (roughly 7 8") fits a 1 2" Cable Gland The 3 4" has a 26mm hole (roughly 1") fits a 3 4" Cable GlandThe 1" has a 33mm hole (roughly 1 5 16") fits a 1" Cable Gland Make sure the Clamp or Cable Gland you plan to use fits the box you order. I print these to order so it may take a few