In the market for a new dash knob for your International 8600 TranStar? 4 State Trucks offers a selection of replacement knobs including tractor or trailer chrome aluminum air valve knobs with blue, green, purple, red, or silver sticker options. We also offer replacement stickers, emergency brake knobs, chrome cigarette lighter knobs, wood control knob sets, glove box knobs with red jewels, 1/4" chrome control dial knobs, gun barrel air valve knobs, yellow trailer brake knobs, and chrome tractor trailer logo brake knobs.