Dwyer Magnehelic A-27 Differential Pressure Gauge & Durablock Series 100 Air Volume Gauge. These gauges came from a retired HVAC contractor.  The hose in DP Gauge has brittled with age, so new tubing will be required.  Comes with the items shown in the photos, nothing more or less.  Shipped FREE to the USA with USPS Priority Mail. Thanks for looking.