1/4" NPT Brass Extender This is a 1/4" NPT solid brass extender. It features one 1/4" MNPT end, 1/4" FNPT connection and measures 1-9/16" in length. This extender works great for attaching to pressure switches and gauges to give you a little bit more room for install. It also comes with a plastic cover for the male end to protect the threads when not in use. If you have any questions about the sizing or anything else, don't hesitate to contact us. Specifications: Material: Brass Length: 1-9/16" Vibration Resistance: Fair Temperature Range: -65°F to 250°F Use With: Brass, Bronze, Copper, Steel, Aluminum, and Iron Pipe Note: 1/4" NPT measures about a half inch in diameter.