1,good quality,long life 2,small size,high temperature 3,rohs compliant 4,all certificate ITEMSPECIFICATIONElectrical CharacteristicsTemp ... Torque4∼15 mN.m40∼150gf.cmTotal Rotational Angle300°±5°Rotary life10,000 cyclesShaft Stopper Strength8Kgf.cmSolderingT≤260ºC,t≤3s 20mm Rotary Potentiometer