Feature: 1. [Applicable Model] These knob hats are suitable for RV24YN 20S, for RV24YN 30S, for WTH118 2W 20S, for WH118 2W 20S and many other potentiometers. 2. [Brass Liner] Potentiometer knobs liner is made of brass, which has good strength, corrosion resistance and prolongs the service life of the knob. 3. [Easy to Observe] These knobs are marked with a white line, which is more convenient to observe, safe to use, and convenient for you. 4. [Set of 50 Pieces] Potentiometer knobs include 50 pieces of potentiometer replacement knob hats, which are sufficient in quantity and easy to use and replace. 5. [Lightweight and Portable] Light weight, small size, easy to carry and store, can be put in a bag to use anytime, anywhere, convenient and fast, stable performance. Specification: Item Type: Potentiometer Knobs Material: Ebonite, Brass Product Model: For BEM-A03 Fixed Form: Side Screw Fixed Knob Diameter: Approx. 27mm / 1.1in Knob Height: Approx. 15mm / 0.6in Knob Inner Diameter: Approx. 6mm / 0.2in Product Quantity: 50pcs Scope of Application: Suitable for RV24YN 20S, for RV24YN 30S, for WTH118 2W 20S, for WH118 2W 20S and Other Potentiometers. Package List: 50 x Potentiometer Knobs