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for Ford Power Steering Vacuum Bleeder Adapter Rubber Stopper Size 11 Drilled 1/4" Barbed connector

This is a #11 Lab Grade Rubber Stopper

Measures 56mm (2.2 inches ) across the top  48mm (1.81 inches) across the bottom

Stopper is fitted with a 1/4" barb

Works great.  Does not have an O-ring that can fail

Fits nicely into the good ol' Ford power steering pump to help fix that dreaded whining sound

Obviously you need a (hand) vacuum pump to hook up to it, and do not go crazy with the vacuum , you can cause more problems by breaking the seals loose on your steering rack.  Read online how to perform this.  I turn the power steering by hand both ways while applying the vacuum to help get that air out of there

The picture is from a  1991 Mustang

Ford literally stuck this same power steering pump on just about everything they made back then up into the 2000's

Mustang, Taurus, Thunderbird, Explorer, F150 and more

The power steering pump picture and cap is for reference, this is what your power steering pump and cap should look like.

Tubing is not included.

May work for other projects, lab experiments or bung holes that require this size stopper

Includes: 1 stopper with attached barb fitting, that's it...

Sometimes I get different brands of barbs, but they are all basically the same,
so the one you get may have 3 or 4 barbs, or may not have the little ridge in the middle of the barb,
regardless, the functionality is the same