The Step Lite Mounting Canister provides an efficient and professional method of luminaire mounting in concrete, stone or brick. The mounting canister is installed during the rough in stage of construction, avoiding damage to the luminaire itself. The canister holds the luminaire in place by means of two high temperature, heavy duty gaskets and allows installation with no visible screws on the front trim. UL1838. cCSAus listed. 3 inch diameter x 5.75 inch length.