1/4 National Pipe Thread x Prest-O-Lite 2 Long Hard Nose 2 Overall LengthThe 1 4 National Pipe Thread x Prest O Lite 2 Long Hard Nose 2 Overall Length is a propane fitting designed to connect POL style propane tanks to NPT (National Pipe Thread) connections. The hard nose POL connection ensures a strong and durable seal, while the extended 2 inch overall length (OAL) allows for better reach in tight spaces. This fitting is commonly used in propane gas regulators, fuel transfer systems, and high pressure applications.