KB900BA1/4 is a black aluminum control knob designed for use with 1/4 inch shafts. This knob is manufactured by TE Connectivity under the Alcoswitch brand and is suitable for potentiometer and rotary switch applications. The product is EU RoHS/ELV compliant, meeting the substance restrictions of the Restriction on Hazardous Substances Directive 2011/65/EU (RoHS2) and the End of Life Vehicles Directive 2000/53/EC (ELV). Common applications include audio equipment, instrumentation panels, and industrial control systems where reliable and durable knob interfaces are required.