This 36" Bridgestone charging hose stands the test of time. Standard hoses are an economical alternative. Knurled brass nuts make finger tightening easy. Crimped with 8 segment dies for secure fit and maximum durability. Designed for use of R12, R22, R502. This hose fits manifold gauge set the 1/4 npt ends.   
For use with 134a, use a snap coupler (available separately for purchase)