Contains usefull IC types such as: Photocouplers, , Osciallators, Dual Opamps, Opamps, Comperators, Audio Amplifiers, Processors, Current Mode Controllers, Arrays, Voltage Charge Pump colour:black Material:plastic Package Contents: 20 x PC817c, DIP-4, General Photocoupler 2 x ICL7660s,Super Voltage Converter, Charge Pump 20 x NE555, DIP-8, Timer, Pulse generation, Oscillator 10 x LM358,DIP-8, Low Power Dual Operational Amplifier 10 x LM324,DIP-14, Operational Amplifier 10 x JRC4558,DIP-8, Dual Operational Amplifier 10 x LM393,DIP-14, Low Offset Voltage Dual Comparator 10 x LM339,DIP-8, Low Power Voltage Comparators 5 x NE5532,DIP-8, Dual high-performance low-noise Operational Amplifier 5 x LM386m,DIP-8, Low Power Audio Frequency Amplifier 2 x TDA2030A,TO-220, Audio Amplifier in a Pentawatt Package 5 x TDA2822D,DIP-8, Low Power Stereo Op Amplifier 3 x PT2399,DIP-16, CMOS Audio Processor 5 x UC3842AN,DIP-8, High Performance Current Mode Controller 5 x UC3843AN,DIP-8, High Performance Current Mode Controller 5 x ULN2003AN,DIP-16, Bipolar (BJT) Transistor Array 7 NPN 50V 500mA 5 x ULN2803APG,DIP-18, Bipolar (BJT) Transistor Array 8 NPN 50V 500mA 2 x DIP4 Socket 7 x DIP8 Socket 3 x DIP14 Socket 3 x DIP16 Socket 2 x DIP18 Socket 1 x DIP8 - SOP8 Through Hole to SMD Conversion Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.