Our Rack Brackets are designed of factory spec hardened industrial aluminum and intended to be used in 19” Racks. Mounting holes are designed for a 1U Eurorack opening on the inside and precise 19” rack mounting on the outside. Comes with rail end screws for mounting to EH! Modular Rails. 19” rack mounting screws are sold elsewhere. EH! uses the same internal 1U dimensions as PulpLogic. Intellijel modules will not fit.