TRUEGRID ECO (1" Depth) Permeable Pavers, (DIY) Driveway-in-a-Day, Patio, RV Pad, Drive-On Grass & Gravel (18-pack 72 Sf) Each box contains 18 - 24 x 24 x 1 grids covering 72 square feet (DIY) Driveways, patios, storage areas, RV pads, parking spaces. Strong, durable, 100% permeable surface. Made in USA. Easy-to-install. No tools, no staking. Patented system. No more mud, puddles, ruts. Works in all climates, soils. Gravel or grass fill