Check the listing for details. 4 Original Knobs for Olson Electronics AM 400 Amplifier. 4 Original Metal knobs. Color: Silver, Condition: Used. Listed at 21.00 USD. *4 Original Olson AM-400 Amplifier Volume / Tone Knobs* ...(PARTS ONLY)... ...(NO Amplifier is included)... ...May fit other models... *See our other listings for more parts for this model* ...(FREE SHIPPING)... *Selling as is for parts and sale is final with no warranties, guaranties or adjustments and no returns... Sale Is Final... *See our other listings for more receiver parts* *See our other vintage stereo in our other listings* Classic Audio Video & Stereo 3315 Harrison Ave. Cincinnati, Ohio 45211..........[West Side, Cheviot Westwood Area] Being sold as is and sale is final with no guaranties, warranties or adjustments or returns. SALE IS FINAL with NO RETURNS ....................................................................................... See our other listings or stop in our store for more vintage Stereo and Turntables, Reel to Reel, 8 track, Record albums, ETC. Classic Audio, Video and Stereo...3315 Harrison Ave. Cincinnati, Ohio 45211 ........................................ Thank You.