The S & G Tool Aid Corp. Adjustable 8-Piece Fluid Line Stopper Kit, No. 19700, is used to seal metal lines once disconnected to prevent fluid leaks and contamination during service. Each stopper adjusts and locks to three positions and installs in seconds. The kit is for use with all automotive fluids as found with fuel, brake, A/C, banjo, power steering and transmission lines. In each kit are two each of four stoppers: Banjo Bolt, 5/16", 3/8" and 1/2". The kit is supplied in a durable, plastic storage case.