Veranda 4 in. x 4 in. Black Solar-Powered Post Cap for Deck or Fence, Black (12 PACK) Fits WOOD 4 in. x 4 in. posts with ease, not designed to fit VINYL. Made from durable plastic Black finish with an ice white led Solar panel offers convenient lighting without the hassle of wiring Includes long-lasting led bulb, rechargeable battery and hardware Common 4 in. x 4 in. Nominal Dimensions