AllPoints Foodservice Parts & Supplies 561179 Parts & AccessoriesTwist Handle Waist Drain, Sink Opening 3 1 2", Drain Outlet 2" Nps, Face Flange 4 3 8" Od, Actual Dimension Of The Top Is 4 3 8", Current Inventory Does Not Have An Overflow Outlet., We Will Be Out Of The Multi Use Twist Drain Untill Later In, This Year 2014., You Can Substitute A Lever Handle Drain # 56 1376.., Which Includes The Overflow Outlet If Needed., Product Dimensions Height 5" Depth 15. 5" Width 4. 5" Weight 4. 9 Lbs