MICHIGAN CITY, IND. (February 19, 2025) – Hitachi Global Air Power US, LLC, an industry leader in innovative compressed air solutions, announced the company’s custom-designed Sullair 185 Series Tier 4 Final Portable Air Compressor brought in $35,000 at the 2025 ARA Foundation Charity Auction. The winning bid was placed by Roger Adkins, Vice President - Air Compressor Business Manager at Ring Power.