MODEL: AER1*23 DW ALP G1G1G1 C7 BK 23103 STANDARD-HEIGHT RANGE GAS-LIFT, TENSION CONTROL, TILT LOCK, FORWARD TILT, FULLY ADJUSTABLE ARMS WITH BLACK ARM CAPS, ADJUSTABLE POSTUREFIT LUMBAR, "PELLICLE GRAPHITE" MESH SEAT & BACK, GRAPHITE FRAME & BASE, "A", "B", "C" SIZE AVAILABLE (item #60158)