Compatibility: This product is compatible with Video Doorbell, Compatible with Video Doorbell 2Pro. Made of thick and flat doorbell replacement screws to ensure proper safety, increase service life, and properly adhere to the bracket installed on the doorbell, providing you with a good user experience. Easy to install: Direct replacement without adjustment, perfect compatibility, high reliability. Product material: This product is specially designed with metal material, high service life and not easy to damage. Product include a total of 20pcs 4.8x6.7mm Doorbell Screw, 20pcs 4.8x9.3mm Doorbell Screw, 20pcs 5.3x8.8mm Doorbell Screw, 20pcs 5.3x11.4mm Doorbell Screw, which can completely meet your daily use needs and replacement., Manufacturer: ECSiNG