Hypro Diaphragm Pumps - Replacement PartsAR3120420Threaded AdapterReplacement for: 9910-DP423, 9910-DP423GRGI, AR45LFP, AR45LFP-GRItem # in Image: 40Quantity Required: 1 This item is not kept in stock, and will have to be ordered in from the manufacturer when order is placed.More...