A black ABS enclosure with side flanges allowing wall, or even ceiling mount. Snap fit design locks together to enclose your circuitboard or project inside. Features: Wall mount holes: 2 x 4.5mm Dia. Internal holes: 4 x 2.6mm x 6mm Internal dimensions: 45(L) x 46(W) x 18(H)mm External dimensions: 70(L) x 51(W) x 27(H)mm