Rubber-Cal "Eco-Safety Interlocking Playground Tiles - 2.50 x 19.5 x 19.5 inch - Pack of 4 Playground Tiles, 11 Square Feet Coverage - 4 Colors Made with durable recycled rubber tires that can weather any storm Available in four unique colors; a playground surface with added flair! Waffle design softens impact and absorbs vibrations by flexing upon compression Easy-to-install interlocking playground tiles are perfect for home or public playgrounds Playground tiles rated at a 6 foot critical fall height in compliance with ASTM F1292-09 requirements