Dual gang miniature 20K linear taper potentiometer for panel mounting has 0.4" long x 0.25" (dia.) knurled metal shaft for knob (not included). Mounts in a 0.28" dia. hole in panel with included nut. Size of body 0.38" x 0.38" deep x 0.45" tall (excluding bushing, shaft and 6 connection pins). Great for guitar applications. Sold in a package of 4.