3/4" MALE NPT fitting. BOX OF 10 One end connects to 3/4” (1620) GASFLEX, and the other end is a 1/2" MALE NPT. The gasFlex flexible gas piping system is a complete natural gas and propane piping system internationally certified to ISO Standard 17484-1. Used in Europe, America and Australia for over 20 years , this technology is now revolutionizing the way gas is installed in homes across the USA and Canada. GasFlex is an ALUMINUM tube lined with inner and outer layers of tough UV resistant polyethylene (PE). ALUMINUM is listed for gas use in the National Fuel Gas Code (NFPA 54 ). Unlike CSST pipe, there is no electrical conduction within the gasFlex pipe system and there is no chance of electrical surge or pipe wall damage caused by nearby lightning strikes The PE inner and outer layers protect against corrosion enabling the pipe to be embedded in concrete and installed underground. No more soldering joints or accessories for every change of direction. The flexibility of gasFlex tubing results in easy rollouts and the Stay-in-place feature makes it ideal for interior gas piping systems, underground drops to a fire pit or barbecue at the yard and behind the wall installations. Costs up to 7 times less than copper pipe. 1/3 the cost of CSST pipe Half the cost of black iron pipe gasFlex flexible pipe delivers 50% savings in labor costs when compared to copper and black Iron