Compressor, comprising a sealed outer casing, inside which is arranged a gas compression stage driven by a motor arranged inside the outer casing. A flange extends downward from one of the plurality of side walls at an angle toward the floor. The hydrogen generation apparatus can generate hydrogen with less energy and achieve space saving. Thereby, the sleeve is adjustably positionable relative to the shaft so that the sleeve remains generally centered within the seal as the sleeve and shaft rotate about the axis. A release layer is placed on the adhesives for ease of transport and application, but is removed prior to affixation of the tamper-evident label.