Pentair R171056 Rainbow 300-19 Automatic Chlorine/Bromine Off-Line Spa Feeder<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Rainbow 300-19 automatic chlorine/bromine off-line spa feeder</li><li>Includes double-capacity 19-inch chamber and treats 13，000 to 52，000 gallons</li><li>Operates on pressure side of pumps</li><li>Uses 1/4-inch feeder hoses， control valve and fittings</li><li>Measures 7-inch length by 30-1/4-inch height by 7-inch width</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31O%2BoFnUSUL.jpg" noproxy>