... Size: 500 x 500 x 5.5mm Rubber floor used rubber particles and adhesives and non-toxic pollution-free ... according to need different thickness and density, production of color. Common basic specifications for 500 x 500 ... 15-25 mm, 25 to 50 mm, color with red, yellow, green, blue, grey, black, etc.Product ... uv performance is good, can meet the needs of different places.3, water resistant performance is good ...