This is a Rear crankshaft seal with wear sleeve for IH engines models 312, 360, 361, 407, 414, 436 and 466.P/N. 1809964C92. This will fit early Navistar engines with 5 " crankshafts.This will not fit later Navistar engines with 5 1/2" crankshafts. The picture shows the sleeve separate from the seal for a better visual picture but the seal comes with the wear sleeve installed. They should not be separated . They should be installed together at the same time..Check out my store for the Installation Tool. Email if you have any questions on installing this seal . I also have the Noeprene style available.