Hidden River Lab Premium 0.5” Spacer is designed to improve the fit and finish of installations for Wired Doorbell Pro (3rd Gen). This proprietary spacer adds a precise 0.5” offset behind the mounted doorbell to provide additional wire clearance, help cover small wall imperfections, and create a cleaner-looking finished installation. It is especially useful when replacing an older unit or when extra space is needed behind the doorbell on a flat mounting surface. Developed and made in the USA, this HRL accessory is manufactured from durable UV- and weather-resistant material for long-term outdoor use. Includes required hardware and installation instructions. Compatibility: Designed for Wired Doorbell Pro (3rd Gen). Check product images and fit guidance before purchase to confirm compatibility with your specific doorbell model.