1、50Pcs in 1 Set: Includes 50pcs potentiometer knobs, with sufficient quantity, can be used and replaced at any time. 2、Applicable Models: Suitable for RV24YN 20S, RV24YN 30S, WTH118 2W 20S, WH118 2W 20S and other potentiometers. 3、Easy Observation: These knobs are marked with white lines, which is more convenient for observation and safe to use. 4、Plastic Shell: The control knob shell is made of engineering plastic, which is light in weight and good in insulation. 5、Brass Interior: The interior is made of brass, which has good strength and corrosion resistance and prolongs the service life of the knob. 50 x Potentiometer Knobs Item Type: Potentiometer KnobProduct Material: Engineering plastic + brassProduct Model: BEM-A04Fixed Form: Side screw fixedKnob Diameter: Approx. 33mm / 1.3inKnob Height: Approx. 16mm / 0.6inKnob Inner Diameter: Approx. 6mm / 0.2inProduct Quantity: 50pcsApplication: Suitable for RV24YN 20S, RV24YN 30S, WTH118 2W 20S, WH118 2W 20S and other potentiometers