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: Provides stability, visualization of electrical principles, screw terminals for convenient wiring, ensures safe electrical connections. Low voltage: Maximum working voltage 36V. Designed for low voltage and low current applications with DC power supply. Knife switch allows stable operation and clear demonstration of electrical principles. Experimental use: Suitable for eonal environments such as schools to conduct on-off experiments in single circuit configurations, helping students learn basic electrical and circuit principles. Intended for laboratory use only; not suitable for household or residential wiring. Material: Copper. Color: Black. Contents: 10 x Single Pole Single Throw Knife Switch. Only the items listed are included. Note: Due to lighting and display differences, the color may vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.