Used with ZTSE433011 & ZTSE4330A basic kit to install pre-sized king pin bushings. 1.73″ Step O.D., 1.6″ Main O.D. x 2.6″ Length. Navistar Axle Applications: FA-118, FA-127, FA-139, FA-242, FA-248, FA-309, FA-329, FA-336, FA-337, FA-338, FA-339, FA-340, FA-341, FA-342. DANA/SPICER Axle Applications: I-90, I-108, I-120, I-132, I-135.