Vacuum Pump Membrane Kit to fit A-dec®/W&H Lisa Membrane Kit (A-dec® #54.0051.00) Kit includes: Diaphragms, Qty. 2 Butterfly Valves, Qty. 4 O-Rings, Qty. 4 A-dec® is a registered trademark of A-dec, Inc. DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec® products.