Set of 4 brown knobs with white numbers. Push on type mounting for standard "D" shaped pot shaft. Diameter measured at the bottom of the skirt is .895". As found on some modern Fender amps. Used on Acoustasonic™ Series amplifiers manufactured from 1998-2004. Brand New. Genuine Fender 0051018049. UPC 717669106508. Photo may not reflect current Fender packaging.