INSTANT-OFF Home 350 Max Water Saver, Automatic Shut-Off Valve for Bathroom & Kitchen Faucets. 3.5" stainless rod controls water flow. Stops drippy faucets, Easy Installation,Unconditional Guarantee Automatically Shuts-Off Water Saves Money By Eliminating Wasted Water Conserves Water - Sustainable Design - Zero Waste Stops Drippy Faucets Easy Installation - Replaces Aerator