Wika 2.5 type 611.10 30 inh2o/mmh2o vac gauge – 1/4 npt lm steel wika type 6×1.10 low pressure gauges are extremely sensitive and highly accurate. The capsule element pressure system is designed to measure pressure and vacuum of gaseous media from as low as 10 h2o to 275 h2o (10 psi). The finely polished nickel-silver pinion gear and shaft of the movement ensure repeatable accuracy. specifications: connection location: lower mount wetted parts: brass copper alloy case material: black steel case filling: standard window type: non-reflecting window construction: acrylic