The Mallory F12 Universal Flatted Shaft Volume Control is a replacement potentiometer component manufactured by P.R. Mallory & Co. for vintage electronic repair and radio restoration. Rated at 7.5K Ohms (7,500 Ω), this control features a broad base measuring 1-1/2 inches in full diameter and a 3-1/2 inch shaft length. The shaft configuration features a 3/4 round outer diameter with a 1/4 inch inner flat diameter for precise knob fitment and reliable resistance performance.