This SBR granule is irregular figure and mainly used in athletic running track,plastic running track,sports ... breaking elongation rate and tensile strength.Ingredients:natural rubber and synthetic rubber as well as sulfur,carbon black,iron ... 4mm 3-5mmColor OptionEarth yellow,multicolor&blackApplicationPlastic racetrack,prefabricated rubber rolls,speed railway,artificial turf fillers,airport,etc., ...