20-0639 Hi Density Foam Rollers are extra firm and will last much longer then White single construction foam rollers. This foam roller is 36” in length and 6” in diameter. It can be used to enhance balance, body awareness, muscle re-education, flexibility, myofac Features: -Premium hi-density foam roller. -Color: Black. -Provides firm support for all body types. -Hi-Density foam construction. -Dimensions: 36” L x 6” W. -Overall Dimensions: 36” H x 6” W x 6” D.