Products specification : 13-18mm Products details: material: PU rubber, EPDM rubber Characters: high cost, can be installed in high grade stadium etc. Sports result can be acknowledged by Chinese General Administration of Sports. easy installation, resilient, abrasion resistance, Acid & Alkali Resistant, ageing resistance, enviromental friendly, cotrol dust & bacteria, easy maintenance, colorful. It can beautify surroundings and enhance students interests in taking part in sprots.