Power Acoustik HDVD-91CC 9" Universal DVD Headrest With USB/AUX Universal Replacement Headrest Preloaded w/ DVD Player & 9" LCD Forward/Backwards Tilting Headrest 3/8" Locking Pole w/ 1/2" & 9/16" Adapters 4.75" ~ 8.25" Pole Width Adjustment Dimensions: 11.5"w x 6"d x 8.5"h