About this item Please measure your post size before making purchase. The Post Size Must Be SMALLER Than 3-13/16" Square. The Bottom Opening of the Post Cap which Fits over the Top of the Post is Exactly 3-13/16" x 3-13/16". These Post Caps are NOT designed for Plastic, Vinyl, or PVC posts. LIGHT AND STYLISH CONSTRUCTION - Heavy duty ABS plastic casing is durable, designed to withstand the elements, but still lightweight and easy to install. A styled metallic finish adds an on-trend design to any yard. Weatherproof – Designed to Protect the Lights from Natural Elements. Easy to Install. No Wiring Required. All Fence Post Attachments and Parts are Included. ENERGY EFFICIENT SMD LED - Improved SMD (Surface Mount Diode) LED produces a wider beam of light that spreads out over a greater area for better visibility. The light source produces higher lumens per watt, which means that they produce more light with a lower wattage. Automatic Sensor Activates at Dusk with NEW and IMPROVED Solar Panel for Superior Charging Performance › See more product details