Take the hassle out of transmission/oil cooler line repair. Everything you need in one place to repair or replace cracked or leaking transmission/oil cooler lines quickly and easily. The master kit, TRK-555, includes connectors, adapters, tube nuts, as well as the hose, clamps, and pliers in one convenient place. The kit contains components for 5/16 and 3/8 lines for use on most domestic and import applications. The rubber hose is durable triple-walled and is pressure rated up to 250 PSI. With the master kit your repair is as easy as one, two...done.