The Meritor S431-700-001-0 or S4317000010 is a genuine OEM pressure switch for trailer RSS (Roll Stability Support) brake safety systems. This switch features a 3/8-18 NPTF port connection, making it a direct fit for trailer air brake circuit monitoring applications. As a genuine Meritor part, it is sold by Pro Gear and Transmission. Call us to confirm proper fit for your trailer brake configuration before ordering.FeaturesGenuine Meritor OEM part number S431-700-001-0 or S4317000010Designed for trailer RSS (Roll Stability Support) brake safety systems3/8-18 NPTF port connectionSafety systems component for trailer air brake circuitsSold by Pro Gear and TransmissionTech SpecsPort Size: 3/8-18 NPTFApplication: Trailer RSS (Roll Stability Support) brake safety systemOEM Part Number: S431-700-001-0