Rated: 129 psig @ 350F, 300 psig @ 100F. Square Pattern Bronze Water Gauges. Available with 12" (ASTM B-16 brass bar stock) or 34" (B-584 cast bronze) NPT male pipe connections. Four guard rods and EPDM gauge glass gaskets standard. Other glass gaskets available. Automatic ball checks help prevent the loss of fluids should the glass be broken.