Features: Stackable design: This protective shell is designed specifically for RPi 5 and has a stackable structure, making it convenient for users to stack and assemble multiple for RPi saving space. Acrylic material: from good quality clear acrylic material, it protects the for RPi while showcasing its internal structure and craftsmanship beauty. Effective heat dissipation: The protective shell is equipped with heat dissipation holes and fan installation ports, which can effectively help for RPi dissipate heat and provide more stable performances. Lightweight and Portable: The product is compact and lightweight, making it easy to carry and move, suitable for users to use in different scenarios, providing convenience in protecting and assembling for RPi. Keep your board cool and running smoothly with the built in ventilation system, ensuring optimal performances in any situation. Specifications: Item: for RPI5 Board Enclosure Size: Mixed Shell material: Acrylic Types: 1 Layer/2 Layers/3 Layers/4 Layers/5 Layers Package: A/B/C (1/2/3/4/5 Layer) A: Acrylic Enclosure Only B: Enclosure with 3007 PWM Cooling Fan C: Enclosure with Silver Heatsink Package Includes: 1 Set Cooling Case (Optional Package) note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.