2 Pack, 12" x 12", Better Than Rocks, Planter Drainage Material That Is Placed In The Bottom Of Planters & Provides Optimal Drainage, Lighter Containers & Superior Plant Health, Better Than Rocks Is Easy To Use, Made Of 100 Percent Recycled Plastic & Reusable Year After Year, It Fits In Any Size Or Shape Container Including Deck/Patio Planters, Window Boxes & Indoor Houseplants.