Durable: Made of copper material, high safety factor, durable. Single pole single throw switch for making and breaking a single electrical connection circuit.Easy to use: Stability, visualization of electrical principle, screw terminal, convenient wiring, safe electrical connection.Low voltage: Max working voltage 36V. Low voltage, low current switch for low voltage DC supply. Knife switches provide stability processing and visualization of electrical principles.Experimental use: Suitable for schools to conduct on-off experiments of single electrical connection circuits, providing students with learning electrical and circuit principles. This is for laboratory use and cannot be connected to home.Material:coppercolour:blackPackage Contents:10 * Single Pole Single Throw Knife SwitchOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store