Features: Multiple color printing support: MMB CAN ERCF expansion board can realize multiple color 3D printing, enriching users creative choice and make printed works more creative. High compatibility: Suitable for many mainstream 3D printers, easy to install and provide users with flexible expansion solution. Stable performances: Optimized communication protocol and power management ensure the stability and reliability in the printing process and reduce the failure rate. High-temperatures resistant materials: Selected from high-temperatures resistant materials to ensure the stability under long operational and adapt to various working environment. Rich functional interfaces: Equipped with multiple expansion interfaces, it is convenient to connect other devices and enhances the functionality of the printer. Specifications: Size:Approx.108x59mm/4.26x2.32inch Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1 Set Expansion Board