This is a 3/8" x 48" 2 wire hydraulic hose working 5,000 PSI, with 2 female JIC Swivels, threads are 9/16 x 18 threads. all of our assemblies have plastic caps for the fittings to protect the threads during shipping and in storage and the caps also help keep the tube kind. PLEASE CHECK YOUR OLD ASSEMBLY; if you used a 11/16 wrench on both of the female swivel nuts, this assembly thread to your equipment just like your old assembly. PLEASE note you could have a old Gates assembly and the swivel nut will fit 3/4 size wrench.