Gauge Type: Diaphragm Differential Pressure Gauge Dial Size & Range: 41⁄2" 0-15 P.S.I.D./100 kPa DP Gauge with a 11⁄2" Line Pressure Gauge Differential Pressure Accuracy: ±0.2 P.S.I.D. (Descending) Working Pressure: 200 P.S.I.G. Body Material: Glass Reinforced Engineering Thermoplastic Wetted Internals: EP Elastomers, Brass and 316 S.S. Metal Parts (Nylon Tubing on 830) Valves: Soft-Seated Needle with replaceable seats Hoses & End Fittings: Nitrile jacket and liner, Schrader 1⁄4" brass coupler, inline field serviceable filters Carrying Case: Durable Molded Plastic Hose Length: Three each / 5' long (color coded). Bleed Tube: One each / 4' long clear (845-5 and 830 only). Filters: Test kit is protected with 90 micron filters to minimize plugging with scale, sand, etc. Elements can be cleaned or replaced. Adapter Fittings: Three sets of brass fittings provided for hookup to all standard size test cocks. Temperature Limitations: Maximum 150°F/65°C. FREEZING TEMPERATURES MUST BE AVOIDED!.