Features: 1) Case with rolling 2) Dial: 1.5", 2", 2.5", 3", 3.5", 4", 6" 3) Connection size: 1/8", 1/4", 3/8", 1/2" 4) Connection threads: NPT, BSP (G, PF), BSPT (ZG, PT) 5) Connection mounting: bottom, top, left, right, center back, offset back 6) Material: a) Case and rolling bezel: stainless steel b) Bourdon tube: brass, phosphor bronze, stainless steel c) Connection: brass, stainless steel d) Dial and pointer: aluminum e) Window: glass, polycarbonate 7) Pressure range: vacuum, compound, 0 - 15psi - 10,000psi producing area:China