Fire resistant alarm and signal bases (shallow, deep and 'U' bases) Eaton's range of fire rated alarm and signal bases offers flexibility over legacy Fulleon conventional devices. The RoLP, RoLP Solista, Solex, Flashni and Maxi families all use a bayonet design that enables joint mounting. The range includes options for midi angled single, midi "U" single, "U", deep and shallow soles. The shallow base is suitable for concealing cables allowing installation with minimal visual impact. Deep and "U" bases are suitable for all types of surface wiring and provide ingress protection up to IP65. Combinations of two or more deep bases form the basis of the AV unit and allow many permutations of audible and visual warning units.