Perfect set. 【Application】 Perfectly compatible with 1989-2016 Cummins 4BT 3.9L, B Series 5.9L, ISB 5.9L 6.7L, QSB 5.9L 6.7L and ISL9 L9 9.0L. This tool set works for seals and wear sleeves such as 3937111, 3904353, 3802820, 3934486, 3926126 & 3925529.