Allegro Banana Oil Fit Test Kits - Deluxe is Isoamyl Acetate (banana oil) which is the oldest method of testing respirator fit. Its strong, identifiable odor will be recognized if a respirator doesn't fit correctly. The Deluxe Kit includes a fit test tent, jars, 8 1 oz. bottles of a testing agent, paper towels, disposable bags, and other necessary components, in a convenient storage case. This kit yields three-four tests on respirators per one 8oz testing agent bottle.