About This 66 PCS PACKAGE: The brass fittings kit includes: 12pcs NPT reducing adapter; 12pcs NPT hex bushing; 12pcs NPT hex head plug; 12pcs NPT male hex nipple; 12pcs NPT female hex coupling; 6pcs NPT reducing coupling. Various sizes can meet your work needs EXQUISITE TECHNOLOGY: Brass pipe fittings are designed with deep and accurate thread to ensure tight and no leak connection and easy installation. NPT thread has better sealing performance than straight thread. Can use teflon tape before installation to further strengthen the seal and prevent air leakage PREMIUM MATERIAL: The brass fitting assortment kit is made of CA360 premium forged brass, thicker and stronger, durable, threads are deep and accurate, high corrosion resistance, low magnetic permeability and high temperature ductility WORKING ENVIRONMENT: Brass fittings with max working pressure up to 1200psi, temperature range of -65°F to +250°F (-53°C to +121°C). It's hard connect way and in most cases do not require sealant WIDE APPLICATION: The brass adapter kit can be used for connection or extension of various pipes. Apply to plumbing connections, compressed air, refrigeration, hydraulic systems, grease transfer, instrumentation, gas and other applications. Suitable for connecting air, water, fuel, oil, and inert gas lines SIZE NOTE: The brass fittings NPT thread size is a nominal pipe size and it does not represent the actual diameter. NPT thread has a 60° taper, this design makes the cooperation between the threaded joint and the inner wall of the pipeline closer to ensure stable and firm connection and increase sealing performance Overview Size : 1/8 Inch Material : Brass Brand : KOOTANS Color : 66PCS Assortment Kit Item dimensions L x W x H : 11 x 7.2 x 1.7 inches Connector Type : Reducer Thread Size : 1/8 inch Exterior Finish : Brass Thread Type : NPT Item Weight : 1.67 Kilograms