wika pressure gauge 1.Manometer with the steel case. 2.Socket: Brass ... )Application:For measurement of steam, air, oil, water and other pressure media, which have no effect on bronze and brassDial size ... ", 3, 3.5", 4", and 4.5", 6", 8", 10",Pressure range:-30" Hg-0-10,000PSISocket:Brass bottom and back ... available4) U-clamp available5) Other connection sizes available upon request. wika pressure gauge