+3 50-524506-3 RPM/Propeller Control Knob SSV50-524506-3 $58.95 In stock Quantity: 1 Add to Bag Product Details Replacment Propellor Control Knob for Barons and some Bonanzas. Replace that old black knob with one that has the proper shape and color! FAA-PMA approved. Save this product for later Favorite