These one-of-a-kind necklaces are made from various amplifiers, microcontrollers, and microchips in combinations of various packages: PLCC (Plastic Leaded Chip Carrier), TSOP (Thin Small Outline Package), SOP (Small Outline Package), and DIP (Dual In-line Package). Each of these comes in a clear acrylic case, on anti-static foam, which is how non-jewelried microchips are delivered to their final destination to prevent damage to their circuitry. They also come with their individual "Certificate of Authenticity" based on old school Windows software "Genuine Software" assurances, and each of them is hand numbered and signed.