Canister Evacuation Traps 2-3/4" x 3-5/8" 12/Box #2200 (Compare to Evac-U-Trp)Disposable Evacuation Traps eliminates hazardous, unpleasant task of cleaning infectious waste in filters Improves suction performance Saves staff time spent cleaning filters Fits the following units: 1, 2 hp Den Tal Ez single models, Apollo 1 hp, 1. 5 single: tandem models, Air Techniques Vacstar, Ohmeda Matrix most models, Turbine Industries, Techwest Whirl Vac, Vacudent Workhorse single plus other units