Membrane, to fit A-dec® Chair Foot Switch Membrane (A-dec® #61.3048.00) Fits on A-dec® Performer®, 1021, 1040, 311 & 511 Series Chairs 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.