Sized at 11 3/4” x 11 3/4” x 4”, Hanover® EcoGrid® provides the project with 37% open space for drainage aggregate or soil for grass turf. EcoGrid® has the largest percentage of open space in the industry, allowing the most opportunity for water to permeate into the sub-soil. EcoGrid® provides the maximum percolation that a normal drainage field system will accept. Hanover's EcoGrid® interlock for stability to support light vehicular traffic. Stocked in Hanover's Natural color with a Natural finish, custom colors can be accommodated when quantities permit.