Item Type: Potentiometer Knob Product Material: Engineering plastic + brass Product Model: BEM-A04 Fixed Form: Side screw fixed Knob Diameter: Approx. 33mm / 1.3in Knob Height: Approx. 16mm / 0.6in Knob Inner Diameter: Approx. 6mm / 0.2in Product Quantity: 50pcs Application: Suitable for RV24YN 20S, RV24YN 30S, WTH118 2W 20S, WH118 2W 20S and other potentiometers 150Pcs in 1 Set: Includes 50pcs potentiometer knobs, with sufficient quantity, can be used and replaced at any time. 2Applicable Models: Suitable for RV24YN 20S, RV24YN 30S, WTH118 2W 20S, WH118 2W 20S and other potentiometers. 3Easy Observation: These knobs are marked with white lines, which is more convenient for observation and safe to use. 4Plastic Shell: The control knob shell is made of engineering plastic, which is light in weight and good in insulation. 5Brass 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