316 Stainless Steel wetted parts.
.5" 304SS Case, 316SS Internals, 1500 psi, 1/4 NPT Male Bottom Conn, -40 Degree Service Filled, Maximum Indicating Pointer For gauges with MIP, GY40 fill is standard for liquid filled gauges. Vacuum and compound ranges through 0 psi to 20,000 psi.Corrosion-resistant fillable dry or liquid-filled gauge.