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One pair of two 1 - 5/8" tall high quality air brake knob adapter is for all  5/8 x 11  thread air brake / trailer valves and will turn any 1/2 x 13 threaded size shift knob into an air brake / trailer knob. 


* Stainless set screws

* Hex tool included

Pair of Air Brake Adapter - Use with any 1/2 x 13 knob

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