Mack Logo Trailer Octagon Air Valve Knob

Accent your dash with this beautiful, high quality chrome plated aluminum Mack knob. Knob will never tarnish, is scratch resistant and easy to clean.

• Made of chrome plated aluminum
• Sold individually

* Tractor air valve, item 443436 sold separately

To Install:

• Before taking off your plastic knobs, set the yellow and red stickers on your dashboard behind the corresponding valve.
• Unscrew the plastic knobs and install the corresponding chrome knobs onto each valve.
• Make sure the set screw on your chrome knob is not already engaged before starting ignition.
• Screw the button and align the logo the way you want it.
• Tighten the set screw with a 3/32 Allen wrench, not included.