Solid Color Tractor/Trailer Air Valve Knob

Solid colored tractor and trailer air valve knobs. 2-3/8" x 1-5/8". Thread on. Made of ultra-durable Partek resin. Made in the USA. Sold individually. 
Choose color from drop down menu. 

NOTE: Mix and match with other Tractor/Trailer Air Valve Knobs 

Matching Shifter Knob sold separately.