Air Brake Knobs Tractor Trailer Pin Mount 1-1/2” Tall Chrome UP#23178-23179

THESE KNOBS ARE MADE OF CHROME ALUMINUM. THEY MOUNT BY USING A PIN TO HOLD THEM IN PLACE. THEY FIT OLDER MODEL TRUCKS PRE 1990'S, BUT THEY WILL NOT FIT VOLVO. THEY HAVE A 3/8 INCH INSIDE DIAMETER AND THEY ARE 1-1/2 INCHES TALL. THE SET COMES WITH A STAINLESS STEEL PLAQUE WITH -TRACTOR- AND WITH A STAINLESS STEEL -TRAILER- ENGRAVED IN THE TOP, PLUS TWO KNOBS. THE PLAQUE IS 1-5/8 INCHES WIDE AND FITS THE TOP OF THE KNOB. PAIR. NEW.