White PVC Vinyl Neptune Solar Fence Post Cap Light For A True 4 Inch X 4 Inch Post | Single Pack | AWCP-SOLNEPTUNE-4 The Neptune Solar post cap fits externally on a TRUE 4 in. x 4 in. post | Will NOT fit on a nominal 4x4 post (usually measure 3.5 in. x 3.5 in. | Simple to install | Made in the U.S.A. Powerful LEDs to light up your deck, patio or yard | Manufactured from premium quality, durable PVC vinyl with rust resistant lighting components | 2-year warranty Will not fade, discolor or warp | UV Resistant | Water Resistant | Perfect for a fence, deck, or patio post | Rechargeable batteries are included Maximum profile dimensions: 4.010 in. x 4.010 in. | Corner radius: .94 in. | Total height: 3.25 in. | Color: White Illuminate up your outdoor living space with the Neptune Solar post cap light