... rubber silk 3.best quality,price & service 4.EN1177 rubber tile paver Size: 500 x 500 x 15-50mm Material: surface ... crumb rubber, and bottom is black big crumb rubberThis kind playground rubber tile has some predominant capability, elastic, water-proof, slip-resisting ... . They are mainly used in kindergarten, school,park, hotel, hospital, playground, home yard, training ground and other public places.