HMK04 (single) and HMK24 (double) Duramax® spin-on filters feature a die-cast aluminum head, heavy-duty steel body, and die-cast aluminum top plate for added strength. A special head-to-canister O-Ring seal prevents leakage. Nitrile seals are standard; fluorocarbon seals are available on some models. Both models use the same replacement filters and feature identical pressure ratings, but the HMK24 handles greater flow capacity. There’s no need to inventory two different replacement filters. A full range of media options are available, using Donaldson’s exclusive Synteq™ synthetic media. Choose the indicator types and bypass options to suit your application.