The neo hex dumbbells are a colour coded set of dumbbells that are suitable for any workout and suitable for all uses whether it be solo workouts or a pt training session or even in a commercial gym environmentmedium density neoprene coated dumbbell with hexagon shaped head and ergonomic handle available in 13 colour coded sizes from 0 5kg 1kgpair to 10kg 20kgpair sold in pairs