This Ashcroft 1279 Duragauge Pressure Gauge 100 PSI Type 102 Diaphragm Seal is in unused condition and is guaranteed to be functional. Please note that this item is one of our older listings and we are planning to reshoot listing photos. Some of the photos included with original listing were located in the description and as a result could not be transferred. Please see screenshots of the description page from the original listing. We will be happy to provide additional information as well as new photos upon request. Please feel free to contact us with any questions. The comprehensive line of Ashcroft diaphragm seals will meet a wide variety of application or installation requirements. Over 30,000 variations are possible with the types, connections and materials available. Ashcroft 1279 Duragauge Pressure Gauge The top housing and diaphragm are interchangeable with all Ashcroft bottom housings. A fill/bleed connection is standard, which permits filling the seal and instrument simultaneously after evacuation and allows the fill to flow into the completed unit. A Viton O-ring , compatible with all standard fill fluids, and a Teflon back-up ring provide a seal between the diaphragm and the top housing. A thin Teflon PTFE gasket between the diaphragm and bottom housing assures a leak-tight corrosion resistant seal even at high pressure. Top housing and pressure instrument are removable. Continuous-duty design will prevent loss of process fluid if pressure instrument is removed or fails. Features Manufactured by Ashcroft 1/2% full scale (Grade 2A, ASME B40.100) Accuracy Vac, compound to 30,000 psi pressure range 4oe" dial size IP54 dry case protection IP65 liquid filled or hermetically sealed case protection OE" or oe" NPT connection size Lower or back connection location