Maybe one of these similar products would be of interest:-
Hex Dumbbells Rubber Coated Cast Iron Hex Black Dumbbell Free Weights for Exercises 20 Pounds/Pair
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Hex Dumbbells Rubber Coated Cast Iron Hex Black Dumbbell Free Weights for Exercises 27.5 Pounds/Single
Balelinko Hex Dumbbells Free Weights with Metal Handles Rubber Encased Solid Cast Iron Hex Dumbbell in Single, 80 LBS