Plastic Kettlebell 10 - 15 lb (4.5 - 6.8 kg)Kettlebell 10 15 lb (4. 5 6. 8 kg) Filled with Cement and Covered in Plastic The 4. 5 6. 8 kg plastic kettlebells are a well thought out series of kettlebells from Gorilla Sports, each weighing 4. 5, 6. 8, 11. 3, 15. 9 and 20. 4 kg. With one or two handed exercises such as snatch, swing, clean, and jerk, you can boost your metabolism while training all major muscle groups. Versatile and full body workouts Suitable for indoor and outdoor use High