Cliff FC1616 K1C Knob Black - Satin Cap - 1/4" 6.35mm Screw Fix

Cliff K1C Black Control Knobs - Cliff FC1616, A classically-styled, low-cost black plastic screw fixing knobwith satin disk to suit ¼in. shafts. Cliff FC1616 K1C Knob Black - Satin Cap - 1/4" 6.35mm Screw Fix

Price: 3.14 from Rapid Online Rapid Electronics Ltd.