The paver base is the underlying layer upon which pavers are set. Made of different materials such as crushed stone, gravel, and sand, the base is installed to create a stable and level surface for pavers. The base typically includes multiple layers: a sub-base layer, a compacted base layer, and a bedding layer. https://modutile.com/product/gravel-pavers-outdoor-basketball-court-base-24x24/