3D Printer Accessories features: Direct skr v1.5 turbo control main board mks genl tmc2208 tmc2209 3d printer parts for ender 3 pro upgrade cr10 Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Description: 100%brand new and high quality Features: Durable, long service life. Eliminating the trouble of external drive expansion module. Turbo silent board adopts 32 bit ARM which can reduce the stepper motor noise greatly. Large-area cooling pad，it can lower the temperature when drive is working. It can prevent the motor from shaking as well as it is difficult to lose. Specificaions: Size: 109.7x84.3mm/4.31x3.31inches Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. The Package includes: 1 Set of Turbo Control Board