Check the listing for details. Chrome Tractor Trailer Air Brake Valve Knobs - Blue, Red, Silver, Black Set UPI. Condition: New. Listed at 32.99 USD. Chrome Tractor Trailer Air Brake Valve Knobs - Blue, Red, Silver, Black Sets Air Brake/ Valve Tractor Knob set & Trailer Knob set Screw-on Chrome Body with 4 Stickers each United pacific part #'s 22991 & 22992 Buy with confidenceQuality Product, Impeccable Service, @ a Competitive Price Fast & Free shipping! ALL ITEMS I SELL ARE IN STOCK AND READY TO SHIP, I DO NOT DROP SHIPThis Air valve knob is made chrome aluminum Mounts by screwing on existing shaft Has 1-7/8" diameter top and the base has an 7/8" outside diameter. This kit includes 4 glossy stickers For "Tractor" & "Trailer"in black, blue, red and silver. Choose your choice of sticker out of 1 of the 4 that was provided for each knob Kit includes (2) valve knob sets & (8) stickers Shipping: All items ship USPS, please provide valid USPS mailing address. PO Boxes are preferred Feedback: Please read my feedback, My excellent customer service. If you're not happy about your purchase please contact me first and give me a chance to make it right before leaving negative feedback. Returns: We do accept returns, so buy with confidence. Shipping costs are non-refundable. Please read product description carefully prior to ordering. If you have any questions on the product, please send email, we're happy to help. Payment: Payments accepted through ebay managed payments. Ebay will collect sales tax if required by your state. Questions/Comments: Please email questions/comments. If there is a particular product you are looking for that is not listed in the store, please send email, I stock All items that are listed in the store. But I will try to find you what you need if I don't have it in stock. Warranty: Manufactured backed with Exceptional Customer service. Check out my other items!Chrome Tractor Trailer Air Brake Valve Knobs - Blue, Red, Silver, Black Sets Air Brake/ Valve Tractor Knob set & Trailer Knob set Screw-on Chrome Body with 4 Stickers each United pacific part #'s 22991 & 22992 Buy with confidenceQuality Product, Impeccable Service, @ a Competitive Price Fast & Free shipping! ALL ITEMS I SELL ARE IN STOCK AND READY TO SHIP, I DO NOT DROP SHIPThis Air valve knob is made chrome aluminum Mounts by screwing on existing shaft Has 1-7/8" diameter top and the base has an 7/8" outside diameter. This kit includes 4 glossy stickers For "Tractor" & "Trailer"in black, blue, red and silver. Choose your choice of sticker out of 1 of the 4 that was provided for each knob Kit includes (2) valve knob sets & (8) stickers Shipping: All items ship USPS, please provide valid USPS mailing address. PO Boxes are preferred Feedback: Please read my feedback, My excellent customer service. If you're not happy about your purchase please contact me first and give me a chance to make it right before leaving negative feedback. Returns: We do accept returns, so buy with confidence. Shipping costs are non-refundable. Please read product description carefully prior to ordering. If you have any questions on the product, please send email, we're happy to help. Payment: Payments accepted through ebay managed payments. Ebay will collect sales tax if required by your state. Questions/Comments: Please email questions/comments. If there is a particular product you are looking for that is not listed in the store, please send email, I stock All items that are listed in the store. But I will try to find you what you need if I don't have it in stock. Warranty: Manufactured backed with Exceptional Customer service. Check out my other items!