Urban Fitness Dumbbells - 2 x 3kgThese Urban Fitness Hex dumbbells weigh 3kg and are sold as a pair. They are cast iron but are covered in neoprene to help with grip. Dumbbells are great weights for conditioning your whole body through performing a range of exercises including bicep curls, lunges and squats. Delivery is free of charge Please note it is not recommended that young children use weights. Light weights would be appropriate for some teenagers, with the right supervision.