Case Size: 6/5 lb. Koon Chun Plum Sauce is a sweet and tangy sauce, perfect for dipping or as a base for marinades. Koon Chun Plum Sauce (5 lb) is a rich, sweet-tangy sauce made from plums, ideal for dipping, marinating, and glazing. It’s perfect for adding a fruity depth to savory dishes, from stir-fries to grilled meats.