These Screw-In Air Valve Control Knobs with Stainless Steel Script Plate are a practical and stylish addition to your vehicle. Made with chrome aluminum knobs and a stainless steel script plate, these knobs are durable and add a touch of elegance to your vehicle's interior. With a diameter of 1 - 15/16 inches and a height of 1 - 5/8 inches, they are the perfect size for easy handling. The screw-in type ensures a secure fit, and they are available in tractor script or trailer script. Sold individually, these knobs fit most makes and models from 1994 and newer.