1. Built-in long rebar, re-infused sand iron mixture fixed, not hard to be bad. 2. Surface green PVC material one-time suppression, wear-resistant, not drop beads, no smell. 3. High temperature is not easy to aging. Do not damage the floor. 4. New hexagonal design, solid security. 5. Rhombus antiskid handle. 6. One Pair contains two dumbbells, each dumbbell weighs 10KG
