This hydraulic assembly is a 2 wire, working pressure 6,000 PSI. 1/4" hose x 12" with 2 female JIC swivels #4 with thread size 7/16 x 20. All of our assemblies come with plastic caps to protect the threads during shipping and in storage and the caps also help keep the tube clean. PLEASE CHECK YOUR OLD ASSEMBLY; The female swivel nut on both sides of your old assembly should fit a 9/16 size wrench. If any other size wrench fits your swivel nut please let me know and I help you find the correct assembly.