Filter Cassette Holder, accommodates two or three-part 37-mm cassettes with or without a cyclone, 25-mm cassette with cowl, or DPM cassette with a GS-1 Cyclone; clips to a worker's collar; includes 3 feet of 1/4-inch ID Tygon tubing and 25-mm adapter ring. DOES NOT ship to Alaska, Arizona, California, Colorado, Hawaii, Idaho, Nevada, Oregon, Utah, Washington. Wyoming”