2" diameter hard chromed alignment bar, 39-1/2" long, with P?N 303 alignment sleeve that works for both ends,  Large Ford ends for 3.150" (80mm) O.D. and Small Ford. Mustang type ends,  2.835" O.D. (72mm bearings) with a choice of center alignment rings (1 pr). Comes in wood shipping/storage crate. Installation - Service instructions can be found on Service Bulletin #0009.