This is 1" x 1/2"Spacer needed for certain Unity Spotlights.1" long & 1/2" I.D. Some applications require the use of a spacer between the bracket and head housing to provide clearance for proper spotlight head rotation.
A footnote accompanying the application will tell you when a spacer is needed and tell you which part number to order. These are not included in the installation kit and need to be ordered separately.
This spacer is noted as being needed for the following spotlights in some applications. Please consult the Application Guide to know if you need it.\