Description Fleetguard FS19732 is a spin-on diesel fuel/water separator using StrataPore media with 25 micron filtration and approximately 95% water separation efficiency. It is commonly used on Cummins QSB, QSC and QSL engines and other equipment originally fitted with Cummins 3973233, and measures about 202.3 mm in height with 93.8 mm outside diameter and 1-14 UNS-2B thread. Cross references include Cummins 3973233, Baldwin BF1385-SPS, Donaldson P550848, Wix 33732, NAPA 3732 and Volvo 43802263 for wide OEM and aftermarket compatibility.