The MPE+ bundle includes a blank SIM card that can be used as a forensic SIM, and a micro-SIM adapter (it looks like a SIM card but has no circuitry, and has a smaller section the size of a micro-SIM that can be popped out).
The micro-SIM adapter has two purposes: you can pop a micro-SIM into it so that it can be read by the SIM card reader, or you can use it as a template to cut a normal SIM into a micro-SIM. Additional Forensic SIM cards and adapters can be obtained by contacting Sales at sales@accessdata.com or https://accessdata.com/about/contact-us.