Adjustable Weight- With dumbbells available in smaller size,totally up to 44 lbs, you're free to customize the weight setting to meet the training needs.Made of cement mixed substance and polyethylene, the fitness dumbbells kit provides you with various weight options, ranging from 12.8lbs to 44lbs. Key Product Features Multi-purpose Design- Not limited to different dumbbells combination, the fitness equipment comes with a connecting rod and can be assembled as barbell to improve leg muscle training. Multi-functional strength training equipment offers a better training way than any other exercise machines.