the WX8784 filter fits with GRAINGER
the WX6489 filter fits with Applications Using a "Controlled Release" Coolant Additive
the WX5521 filter fits with Iveco Trucks
the WX5520 filter fits with Volvo Engines
the WX5519 filter fits with Volvo Equipment
the WX5518 filter fits with Caterpillar, Komatsu Equipment