... 6”(150mm), 8”(200mm), 10”(250mm) dial sizes availableVacuum to 10,000 psi,. other ranges also available upon requestNPT, BSP ... , compressors, hydraulic presses & machinery, motors, winches, Where vibration occurs & pressure fluctuates constantly.1-1/2”(40 mm), 2”(50mm), 2 ... back connection, front and back flanges, u-clamps.Vacuum to 10,000 psi, other special connection thread availableGlycerin or ...