The HID RP15 Mullion contactless smart card readers DO NOT fit on a single gang box. These adapter plates - fix that problem.
Quickly RETROFIT HID Mullion readers to a single gang box.
Black Textured HDPE Plastic
Lifetime Warranty
Covers Up Gaps and Paint Lines
SGAP-R15-B - RP15 Mullion Adapter Plate
$45.00Price