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. 
Cermet Trimming Potentiometers are as follows:3006 trimpot; 3262 trimpot; 3266 trimpot; 3269 trimpot; 3296 trimpot; 3299 trimpot; 3323 trimpot; 3329 trimpot; 3362 trimpot; 3386 trimpot. 3590 trimpot, 3303 trimpot. 3309 trimpot, 3318 trimpot. pt6 trimpot. pt10 trimpot. pt15 trimpot.
single-turn wirewound potentiometers are as follows:wx030,wx050,wx010,wx13-11,wx13-12,wx14-11,wx14-12,wx118,wx100;
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.
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.