CHOICES – This dumbbell group from CAP is available in 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, and 20 lb PAIRS; Color varies per size CONSTRUCTION – Iron core made from ASTM A48 Grade 20 grey iron then precision dipped in 3mm of neoprene for safety and comfort FEATURES – Original Hex Shaped heads prevent rolling; Medium diameter handle provides essential grip and security during use; Neoprene coating is durable and protective; Color coded and poundage marked on ends allow for easy identification