Powerflex PFF85-410PABLK Front Wishbone Rear Bush Pattern Arm 21mm arm widthPowerflex PFF85 410PABLK Front Wishbone Rear Bush, Pattern Arm 21mm arm width Part Number: PFF85 410PABLK Product Notes (if required): This bush is designed specifically to fit aftermarket arms with a hole depth of 21mm. For genuine OE arms that measure 23mm in depth, please use PFF85 410BLK Size (if specified): 21mm arm width