... to 60kg with an incarease of 2kg Rubber Dumbbell Dumbbell exercises form an integral part of most strength training programs. ... , hypertrophy or muscle mass, explosive power and strength endurance.Rubber hex dumbbell with chrome handle from 1kg to 10kg, 12.5kg to ... 5lbs, 8lbs, 10lbs, 12lbs, from 15lbs to 150lbs, 5lbs increment. Rubber Dumbbell Set