Rongcheng electronics is a manufacturer of high quality, high reliability trimming potentiometers/single-turn wirewound potentiometers/multi-turn wirewound potentiometers/ carbon potentiometers/ceramic potentiometers/resistor/knobs. Pls see our products as follows: Cermet Trimming Potentiometers are as follows:3006, 3262, 3266, 3269, 3296, 3299 , 3323 , 3329 , 3362, 3386, 3309, 3318 trimpot., pt6, pt10, pt15. single-turn wirewound potentiometers are as follows:wx030, wx050, wx010, wx13-11, wx13-12, wx14-11, wx14-12, wx118, wx100, RA28Y. multi-turn wirewound potentiometers are as follows:wxd3540, wxd3590, 534, wxd3-12, wxd3-13, wxd4-23, wxd7-33, wxd5-32, wxd2-53. Carbon potentiometers are as follows:RV16YN, RV24YN, RV24YG, RV30YN, WT118S, WH137, WH5, WTH118. Rotary potentiometers:9mm rotary potentiometers, 12mm rotary potentiometers(metal and plastic shaft), 16mm rotary potentiometers(no switch or with swith), 17mm rotary potentiometers with/without swith, 24mm rotary potentiometers with/without switch resistor are as follows:cement resistor, precision resistor, power resistor. knobs are as follows:pointer knobs, tuning knobs, two colour knobs, aluminum shell knobs, dials. all these above products are lead free.we can offer good quality with competitive price, welcome your enquiry.