Convenient collecting vial is intended for use with ammonium carbonate only (use approx. 1 teaspoon to charge vial). The 2-ounce pocket-sized vial is 1-1/4″ in diameter x 3″ high (32 x 76mm), made of clear styrene with a white plastic screw-on lid. It is supplied with a 5/16″-thick (8mm) polyethylene foam plug to contain the dry killing agent in one end. Supplied without being charged; see #1183 ammonium carbonate.