Portable air compressors are rated by the volume of air delivered at 90 pounds per square inch (psi). This number is ...

One U.S. manufacturer, Ingersoll-Rand, was sufficiently impressed to start producing a similar line of quiet compressors (from $30 to $4,500 more expensive than the unmuffled varieties).

Detailed price information for Global Industrial Co. (GIC-N) from The Globe and Mail including charting and trades.