Generally speaking, it can be purchased, and it does not rule out that only individual businesses are sold as a whole.

Dumbbell pieces are generally sold by weight, and good quality will be relatively expensive. When you buy it, you must pay attention to whether it matches your dumbbell pole. Don't buy it home. If it is suggested to buy dumbbells for home use, one can protect the floor at home, and the other is to minimize the sound of contact with the floor without affecting the neighbors downstairs.