These covers are intended to protect Hannay® Hose Reel Control Switches from moisture and/or other contaminants during over-the-road transit. The MEP-GMC1 is specifically designed to fit Hannay® Guidemaster® control switches while MEP-RDC1 is specifically designed to fit Hannay® red DOT EPS style control switches. Both of these cover fit snuggly over the control to help prevent damage due to moisture or other contaminants thereby increasing the longevity of the control switch.