Cap Neoprene Coated Dumbbell Weights | Single, Pair or Set $9.60 – $34.85 Make sure this fits by entering your model number. #VERSATILE – Dumbbells offer the ability to target specific muscle groups or get a full body workout. #CONSTRUCTION – Iron core made from ASTM A48 Grade 20 grey iron then precision dipped in 3mm of neoprene for safety and comfort.