A new high capacity, multi-media filter bag that promises constant 99 percent removal efficiency is now available from Filtration Technology Corp., of Houston. These absolute-rated bags called the 600 Deep Pleat series utilize a unique design that handles particulates in the size range of 0.9-38 microns. Dirt-holding capacity is maximized by pleating several different media together in a single-pleat pack. The key to its efficiency is a design that provides a large effective surface area within the space of a standard basket.