This low pressure switch fits Mack Universal and Mack CH model air brake systems and uses a 1/4NC thread connection. It monitors line pressure and signals when levels drop below a safe threshold, helping guard against compressor or component damage. Sold as a 2-pack, so two identical switches ship per order.Interchanges:1MR2414PI3633Mack 745-275083This unit is sold in packs of 2.FeaturesLow pressure switch for A/C air brake systems1/4NC thread connectionSold as a 2-piece packFits Mack Universal and Mack CH modelsTech SpecsThread: 1/4NCHeight: 1.2 in.Width: 1.2 in.Length: 2 in.Additional InformationFits Mack Universal and Mack CH model trucks.