The 91A2A-B28-D15/D15L is a single-turn panel control potentiometer manufactured by Bourns, featuring a 7/8" (22.23 mm) metal shaft with L-pattern PC pin terminals for audio taper applications. This model incorporates a conductive plastic or cermet element with resistance values ranging from 1 kO to 1 megohm, offering ±10% or ±20% tolerance depending on the element type, and maintains ±5% independent linearity. The device features an effective electrical angle of 240° ± 5° for linear tapers and includes RoHS compliance. The potentiometer is housed in a 5/8" square panel control format with a 9.53 mm (3/8") bushing diameter, making it suitable for audio equipment, consumer electronics, and industrial control applications where reliable volume or parameter adjustment is required.