Ring Alarm Contact Sensor (1st Gen) Spacer Shim Riser Set / Custom size to order

Ring Contact Sensor (2nd Gen) Spacer Shim Riser Set / custom size to order

Ring Alarm Contact Sensor 1st Gen 4SDAE9-0EU0 BNIB Sealed

3 x 3D Printed Ring Contact Sensor (2nd Gen.) 10mm 15mm 20mm Magnet Spacer Set

Ring Contact Alarm Sensor 10, 15 & 20mm and CUSTOM SIZES Spacer Shim White

Yale Pre Break-in Sensor Spacer Adapter

Outdoor Ring Contact Alarm Sensor 10, 15 & 20mm Spacer Shim Black