Accessory Type:Extension BoardCompatible With:For Raspberry PiAcrylic Case 4 in 1 Kit for Raspberry Pi Zero W and Pi Zero with Heat SinkMaterial,protect your Pi safe1. 4 in 1,perfect for raspberry pi zero w and pi zero2. Acrylic case, easy to install. Perfect show details,with heat sink hole ,perfect for heat sink.3. GPIO Pin: Unassembled 40 pins Gold plated connectors GPIO pin which are labeled for easy prototyping4. Length of 53mm cutout for male GPIO Pin header that it can easy to connect.5. Please tear up the protective film sticker on the case before use it.6. Raspberry Pi is NOT includedNote: Please tear up the protective film on the surface of acrylic case before you use it , and it will be clear transparent.Model:for Pi Zero W and Pi ZeroColour:transparentMaterial:AcrylicPackage Contents:1 * Acrylic Case ( not include raspberry pi )1 * Aluminum heat sink1pcs 20 pin * 2 Male GPIO connector1 * ScrewdriverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.