Sensor Riser Compatible with Ring - Security Sensor Spacer for Wireless Home Security System, Self Adhesive DIY Ring Alarm Spacers (1¾-inch)

The first one was the wrong size, but Amazon sent correct one after I contacted. And new one actually has the sticky tape to install. Didn't even notice that they were missing on first one.

My doors and frames didn’t come to the exact measurements offered so I THOUGHT I could trim this down if I purchased it longer. They cannot be trimmed or cut (according to other customer feedback) so it’s pretty useless for my needs. Oh well, it’s back to searching for another solution