UniFlow perchloric acid hoods from Hemco Corp, Independence, Mo, are engineered for the safe handling of perchloric acids in laboratory procedures. The hoods come in 48-, 60-, and 72-inch widths and include a dedicated wash-down and exhaust system. The UniFlow superstructure is constructed of either polyvinyl chloride or type 316 stainless steel, and features exclusive unitized dual-wall construction for chemical resistance, strength, and durability. A rear drain trough is integral to the superstructure. The fume hood also features a dedicated wash-down with piping spray nozzles and a remote control on the right-hand column. For more information, visit Hemco.