HHO Hydrogen Generator Dryer 1/2" HHO Gas Hose Fittings Easy Maintenance ~ HHO Gas Tight 7" Tall and 4.5" in Diameter ~ Also Available In 1/4", 1/2" & 3/8" Fittings Filters Down To 1 Micron Durable See-Thru Plastic Ships USPS Priority Mail (More than 1 Unit May Ship Standard)