Summer Waves Universal Filter Cartridge Replacement D-Type (2 pack)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>One Inch Chlorine Tablet Dispenser</li><li>Universal Filter Cartridge</li><li>Tablet Stays Suspended in Filter</li><li>Type D</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51OjXG3FcGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51IRY2nhbaL.jpg" noproxy>