The ZE-105 series rotary switch is used to control the ON-OFF of the device. For the material, the plastic base or metal base is available for options. Meanwhile, the rating of these two models is in 1.5A 250V, 3A 1250V, 1A 125VT so that it is suitable for the voltage from all over the world. Besides, the switch not only has the UL certification but the CSA as well to meet the requirement of countries in certificates. As the picture shows that the diameter of the switch is 18mm and 15.2mm, if you need other sizes also can contact us.