UniFlow trace metal fume hoods from HEMCO feature a welded, one-piece seamless polypropylene interior fume chamber and baffle. The exterior is constructed of composite polyresin with horizontal sliding sashes in either tempered glass or polycarbonate with PVC track. The hood is available in 48-, 60-, 72- and 96-inch-wide models with 30- or 36-inch depths. 800/779-4362; www.hemcocorp.com.