Develop your explosive power with our new rubber Slam Ball Gorilla Sports. Developed in rubber and filled with air, its resistant outer structure prevents any risk of perforation during exercise. The Slam Ball can therefore be used against walls or floors during indoor exercises. Suitable for intensive use, like all Medicine Balls it will provide excellent work on grip and reflexes, and reveal your strength as you train. Also see: Médecine Ball storage rackStrong outer coating. No bounce. Excellent surface grip. Weights available: from 3Kg to 20Kg. Weight indication on each Slam Ball. Color : Black. Dimensions and weights:3Kg Diameter 23cm. 5Kg Diameter 23cm. 7Kg Diameter 23cm. 10Kg Diameter 26cm. 15Kg Diameter 28cm. 20Kg Diameter 28cm.