Fitment: 1989-Current For Cummins 3.9L 5.9L 6.7L 1989-2016 For Cummins 4BT 3.9L, B Series 5.9L, ISB 5.9L 6.7L and QSB 5.9L 6.7L. Description： Replace: OE# 3824498 1338, Installs seal numbers 3937111 and 3904353 or the seal from kit 3802820. Material: Made of top high quality and wear resistance steel, durable and strong enough, repeatedly tested and optimized to ensure its excellent performance and lasting service time. Functions: This kit is specially used to place the crankshaft seal properly when installing, avoiding any leakage due to uneven placement and making the job done right and in order. .