Gasket & Diaphragm Kit for Tillotson DG-4HU Aftermarket Gasket and Diaphragm Kit for Tillotson Fits some Tillotson HU series carburetors Replace Tillotson DG-4HU If you are looking for Rebuild Kit, go with RK-21HU Order by 5.00 PM, ship at next day with USPS first class mail