UniFlow Fume Hoods from HEMCO Corporation are available in sizes from 30 to 96 inches wide in bench-top and floor-mount models, with custom sizes addressed to suit special needs. They have a unitized construction entirely of chemical-resistant, fire-resistant, self-extinguishing, nonmetallic composite resin materials. The fume chamber is molded one piece seamless with all corners coved for easy cleaning and light reflectivity. They include low-flow constant volume air bypass and variable air volume VAV models, which are UL 1805 certified. Other process-specific models include auxiliary air, perchloric acid, PVC acid digestion, trace metals, radioisotope, and dual-entry hoods. A selection of electrical, plumbing and ventilation accessories are available, in addition to counter tops and base cabinet options. 800/779-4362; www.hemcocorp.com.