Spa Frog Chemical Bundle - 1 Mineral - 3 Bromine Catrtridges<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>This kit includes 1 Mineral Cartridge and 3 bromine cartridges</li><li>These will fit either your floating Spa Frog system or if you have a built in Spa Frog system in your hot tub</li><li>Easy Spa Maintance</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41zdrWJNoAL.jpg" noproxy>