Outdoor White Aluminum Imperial Solar Post Cap (2-pack) 4 In. X 4 in Manufactured From Durable Cast Aluminum High performance solar lights stays lit for up to 10 hours Lights up automatically every night auto off switch High output surface mount LED technology - 3x brighter than standard LED's Manufactured from durable cast aluminum Will fit over an actual 4 in. x 4 in. or 3.5 in. x 3.5 in. post (3.5 in. x 3.5 in. adaptor included)