Kohler 78913 Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement cartridge</li><li>3/4 inch valve</li><li>High flow rate</li><li>Fits in the K400 and K401</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31rSWNAe00L.jpg" noproxy>