Classy Caps SL086 Plated Prestige Solar Post Cap, 6" x 6", Copper High performance solar lights stays lit for up to 12 hours Lights up automatically every night auto off switch 3 high output led's for brilliant white light 2 long life AA rechargeable batteries included Will fit over a 5.5 " x 5.5" post (ACTUAL Dimensions of opening 5-5/8" x 5-5/8")