50 Caliber Bullet T-Handle Gearshift Knob With 13/15/18 Speed Adapter price-list-default and the air compressor shuts

and the air compressor shuts off

Compatibility: Engineered specifically for Mack RD 688

Note: Verify fitment with your model year and cab style for best results

Ease of Installation: The included mounting hardware and bolt-on design facilitate a straightforward installation process

50 Caliber Bullet T-Handle Gearshift Knob With 13/15/18 Speed Adapter price-list-default and the air compressor shutsHeavy duty solid brass construction ensures strength & durability. Ultra high quality finish. Fits 13 15 18 Speed Gearshift Knobs. Assembly inlcudes: 13 15 18 Mounting Adapter: Item # 70603B, and Bullet Knob: Item # 70747.