This kit contains 8 dual opamps, 2 leaf spring IC sockets, and 2 machine pin IC sockets. Here is a list of the included opamps: RC4558P dual opamp. Texas Instruments, 1992 date code RC4559N Dual High Performance Opamp Raytheon 1983 date code LM1458N Dual opamp National Semiconductor LM833 8 Pin DIP dual opamp National Semiconductor TL072CP Dual opamps Texas Instrument JRC4558D dual opamp Burr Brown OPA2134 opamp CJOD NE5532N Dual Low-Noise High-Speed Audio Operational Amplifier Fairchild Semiconductor