... bar/5800 psiCover material: ABS, Stainless steel 1. 50mm CNG gauge, bottom connection, 1/4BSP, black steel case, snap-on ... psi, accuracy 2.5%3. 50mm CNG gauge, bottom connection, 1/4BSP, polished 304 SS case and crimped ring, polycarbonate plastic window ... , electronic borad inside the gauge, brass internals and connection, ...