The P185 T4F air compressor from Doosan Portable Power features a Tier 4 Final-compliant Doosan D24 engine with a low-maintenance diesel oxidation catalyst (DOC) aftertreatment system. Operating at 74 dBA, the air compressor delivers 100 psi at 185 cfm and 10 hours of runtime at 100 percent load with 500-hour service intervals. Applications include powering hand tools, sandblasting, sprinkler and irrigation line blowout, cable laying and pipeline testing. 800/633-5206; www.doosanportablepower.com.