Check the listing for details. Ring Contact Sensor Spacer Riser - For Ring Alarm Sensor Gen 2 Window Door Patio. Condition: New. Listed at 9.49 USD. Custom spacer/riser for your Ring Alarm contact sensor (Gen 2). This will help align your sensor with the magnet. Ordering - Once order is placed please select the height you'd like for the contact sensor as well as the color. The measurement for the contact sensor is in mm to ensure accuracy. If you need a custom height not in the order box please select "Custom Height" and message us. **Order includes: Riser w/ Adhesive OR Riser (Screw holes) w/ Adhesive - Screws or Contact sensor not included. Material - This item is created using non toxic PLA plastic. We are not affiliated with Ring. We simply create the product to help with the issue of spaced doors that does not allow the sensor and magnet alarm system technology to bind. Return/Exchanges - As this is a custom item we do not allow returns. However, if you have any issues please reach out to us via eBay messaging and let us make it right for you. Proudly made in the USA!