Features:_x000D_ _x000D_ This product is made of high quality materials and is durable and practical. _x000D_ A transistor is a basic semiconductor device that controls current, and can also be used as a non-contact switch. _x000D_ This set has a total of 15 commonly used triodes, a total of 150 triodes, to meet your various needs. _x000D_ There is a label on the box that makes it easy to determine which type of triode you need. _x000D_ All triodes are well packaged and assembled in a transparent box for easy storage. _x000D_ _x000D_ Specifications:_x000D_ Condition: Brand _x000D_ Material: Plastic_x000D_ Type: S9012, S9013, S9014, S8050, S8550, 2N3904, 2N3906, BC327, BC337, Tl431, MPSA42, MPSA92, A1015, C1815, 13001_x000D_ Weight: Approx. 108g / 3.8oz_x000D_ Size: Approx. 174*110*22mm / 6.9*4.3*0.9in_x000D_ _x000D_ Package list:_x000D_ 1 * Triode Assorted Kit 1This product is made of high quality materials and is durable and practical 2A transistor is a basic semiconductor device that controls current, and can also be used as a non-contact switch 3This set has a total of 15 commonly used triodes, a total of 150 triodes, to meet your various needs 4There is a label on the box that makes it easy to determine which type of triode you need 5All triodes are well packaged and assembled in a transparent box for easy storage