The Prothane 21mm rear sway bar bushings in black are replacement sway/end link bushings specified for 2002–2004 Ford Explorer 2WD and 4WD models. These black bushings match the 21mm bore noted in the product description and are intended for the rear sway bar locations on the listed Explorer applications, providing the exact bushing size and color referenced.
Prothane 02-04 Ford Explorer 2/4wd Rear Sway Bar Bushings - 21mm - Black