BisLinks&reg; For Blackberry Curve 8520 Trackpad - Trackball/Touchpad With Flex Cable Compatible with any Blackberry Curve 8520 OEM optical trackpad with attached flex cable No instructions offered, we do not hold any responsibility for any damage during the installation process, please make sure you are fully aware on how to change the appropriate part prior to purchasing, thank you. Brought to you by BisLinks This is a OEM Product.