INTERNAL DIAMETER OF 21mm (0.8 INCH). Please check your pole will fit. Adjustments can be made upon request for orders of 2 or moreplease send a message after purchase. Bracket for mounting small solar panels, such as those for garden fairy lights, on fences or walls. DOES NOT include solar panel or lights. Screws included. Quality may be compromised if exposed to external temperatures higher than 35 - 40 oC Note: Pictures are of the actual product, but are representative as there may be differences depending on colour or sizes options requested. Shade may vary depending on batches on raw materials. This item is 3D printedas such there may be minor imperfections & layer lines visible. Strict quality control is conducted, but no guarantee is offered. Bracket For Solar Light Panel Fence/Wall Mounting