twtade / 2pcs rv24yn20s b202 2k ohm single turn rotary carbon linear variable potentiometer,used for inverter speed regulation. motor speed control + 2pcs a03 knob + 2pcs dials twtade <p>we only sell high quality products.</p> <p>our company's principle is "service first, quality first."</p> <p>this series of potentiometers has a long lifetime .</p> <p>it has a two-year warranty.</p> <p>during the warranty period, if the product is damaged (not artificially damaged)</p> <p>you can contact us by email.</p> <p>we can give you a new one for free.</p>