Powder coated finish. •UL listed high security lock. •Insulation is oven-dried and reinforced with welded wire. •Field replaceable steel panels. •Insulation between all drawers. •Drawer heads have extra insulation. • UL Class 350-1 & 2 Hour with impact rating • C-rated files have 30-foot drop test integrity. • UL-listed high security key lock. • Full height drawer body. • Inside drawer height accommodates hanging or regular file folders. • Heavy-duty drawer suspensions.