1、Made of high quality plastic material, these transistor washers have long service life. 2、These washers are characterized by good insulation, light weight, anti-rust, corrosion resistance. 3、Mainly used to lock on the transistors, to avoid short circuit between the transistor shell and the radiator. 4、The main function of transistor washer is thermal insulation: suitable for crystal power tubes, diodes and transistors where heat dissipation and insulation are needed. 5、Each set contains many flat washers that can be used for a long time, so you don't have to run to hardware store looking for washers for quite a while. Description: Transistors washer also known as insulation particle, plastic washer. Transistors washers are electronic plastic parts series, mainly used to lock on the transistors, to avoid short circuit between the transistor shell and the radiator. Features: Made of high quality plastic material, these transistor washers have long service life. These washers are characterized by good insulation, light weight, anti-rust, corrosion resistance. Mainly used to lock on the transistors, to avoid short circuit between the transistor shell and the radiator. The main function of transistor washer is thermal insulation: suitable for crystal power tubes, diodes and transistors where heat dissipation and insulation are needed. Each set contains many flat washers that can be used for a long time, so you don't have to run to hardware store looking for washers for quite a while. Specification: Type: TW-3/ TW-6/ TW-9/ TW-10 (Optional) Material: Plastic Weight: Approx. 4.5g~12g / 0.2oz~ 0.4oz  Color: White Quantity: 100pcs Package List: 100 * Transistor Washer Note: Please allow slight error due to manual measurement. Thanks for your understanding.