6.5inch touch screen. For Opel Astra K. 8.4inch touch screen. 12.3inch touch screen. 4.2inch touch screen. Please check our this model part number with your original part, make sure they are the same part number and appearance. Thank you for your understanding! The new steering wheel module is not directly installed. The new steering wheel module needs to adjust the code and clear the fault code. If the code is incorrect, it will also cause it to fail to work. Inability to work and malfunctions are coding issues. Professional products cannot provide installation instructions. We will highly recommended the Professional installation. Due to different production batches and ex-factory time, the product model you receive may be different from the link, this is not a product quality issue. They function the same. The compatible models in the car compatibility table are for reference only. Please confirm with our customer service before purchasing! After you get the parcel. Please re-check your received model with our linking to make sure you get the correctly model, then you can find a locally professional equipment installer to installation. If any questions, please provide us the video recorde. Generally, the image can’t display the problems. We will test goods carefully before sent out. We reserve the right to refuse to certain countries. Imaged logos and brand names belong to the respective brand and licensee and serve only as sample images within this offer. We are F2C and have our own factory. From research, design , production and after-sales service, we carefully to control every link. In order to provide customers with better service, we have established a professional customer service team. At the same time, our products provide 24-month quality guarantee, and We will also strive to improve our products and can upgrade the software for you for free, to provide you with a better experience.