Replacement Water Reservoir for Keurig B40, B41, B44, B45, B50, K40, K45, K50, Elite and Classic Brewing Systems - 48 oz (Black) Replacement 48oz Water Reservoir LID COLOR IS BLACK Compatible ONLY with B40, B41, B44, B45, B50, K40, K45, K50, Elite and Classic Brewing Systems Please look underneath your brewer for the model number to ensure compatibility Authentic Keurig Part