PKES150B1/4 is a molded phenolic control knob from the PKES series, designed for rotary control applications requiring a fluted skirt with indicator line. This knob features a spun aluminum inlay and white indicator line for clear position indication, with dimensions of 1.77 inches (44.9 mm) diameter (A), 1.55 inches (39.4 mm) height (B), and 1.41 inches (35.9 mm) skirt diameter (C). It is designed for 1/4" shafts and secured with a No. 6-32 set screw. The PKES150B1/4 is ideal for instrumentation panels, audio equipment, and industrial control applications where precise visual indication and durable construction are required.