Set Includes A pair of 10-pound, 15-pound, 20-pound, 25-pound and 30-pound black cast iron solid hex dumbbells with a two-tier dumbbell rack to store the weights. Different material types of dumbbell options available. Notice - This set ships in multiple boxes, and it might arrive separately on different days. Please feel free to contact us through message center for any package missing or delivery issues! We're here to help! Durable and Reliable Dumbbell heads are made from ASTM A48 Class 20 black iron and joined together by a 1018 cold rolled solid steel handle finished with a durable industrial enamel coating. Weight sizes are respectively marked at their ends for easy distinction.