Replacement Office Chair Armrest Arm Pads Kidney Shaped (Set of 2) S5280 4.25" Wide x 9.25" Long 2 sets of mounting screw holes at 4" (100mm) wide & 5.5" (140mm) wide 1/4-20 threaded mounting screw holes (hardware not included) Cut-out area on underside of arm pad for mounting fixed or adjustable arms measures 6.5" long x 1.75" wide Universal - Left or Right side (both are the same) - Sold as a PAIR - Set of 2