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

Hex Dumbbells Rubber Coated Cast Iron Hex Black Dumbbell Free Weights for Exercises 22.5 Pounds/Pair

Balelinko Hex Dumbbells Free Weights Set with Metal Handles Rubber Encased Solid Cast Iron Hex Dumbbell in Pair, 3 LBS

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