Fits Ring Pro Doorbell for Standard Style Siding. Does not fit origional ring or ring 2 doorbells Does not fit on Dutchlap style siding. Dutchlap siding has a flat front that proceeds into an angled top that slants backwards towards the house. This version should work for common 4" cedar siding, cement board siding, aluminum siding and vinyl siding panels. These mounts do not create a water-tight seal and it's recommend to use caulk to weather proof. If you have curved siding, these mounts may not sit flush. This item fixes the problem where your doorbell, when screwed to vinyl or slanted siding, would face upward. This item will correct this issue so that the doorbell faces straight ahead. This is for the mount only. Doorbell not included. Mounting hardware not included. Big love to engineer Wakitcha , who created this.