ITEM NAME:Swap Coolant Temperature Sensor Water Adapter M12 1.5 to Female 3/8 NPT Description: Male M12-1.5 to Female 3/8"-18 NPT Adapter This adapts SBC/BBC (3/8" NPT) coolant temperature sensors to fit into LS series cylinder heads Compatible with: for all GM LS Series Engines Will fit sensors with .85" length, measured from probe tip to the outer edge of adapter. Most aftermarket gauges will use a 3/8" NPT thread adapter (usually included with gauge) Material: Aluminum Alloy Specification: Size: 12cm/4.72inch Color: Silver Package Includes: 1 Piece Adapter 1 Piece Sealing Washer SKU: DMO0009558052038465.This adapts SBC/BBC (3/8" NPT) coolant temperature sensors to fit into LS series cylinder heads. Male M12-1.5 to Female 3/8"-18 NPT Adapter. 1 Piece Adapter. 1 Piece Sealing Washer. SKU: DMO0009558052038465.