The 91A1A-A32-B15L is a single-turn panel control potentiometer manufactured by Bourns, featuring a 5/8" square format with in-line PC pin connections. This model offers virtually infinite electrical circuit isolation with a metal plain bushing (3/8" diameter × 3/8" length) and a 7/8" shaft length. The potentiometer is available with linear taper characteristics and supports resistance values ranging from 1 kO to 1 megohm with 10% or 20% tolerance, delivering independent linearity of ±5% and an absolute minimum resistance of 2 ohms maximum. The device is RoHS compliant and features metal or plastic shaft options, making it suitable for audio equipment, instrumentation panels, and industrial control applications where reliable, smooth resistance adjustment is required.