This case is designed for Raspberry Pi family, campatible with 3 B, 2 B, B+, B and A. It does not fit for Raspberry A+. This is a stackable case, and you can build more stacks by purchasing our stackable kit (item B00MRLM9QS). A Stackalbe Kit adds an additional layer on the case. Please send us an email to info@geauxRobot.com if you have questions for your stack case project.