Dumbbell /哑铃

This model features a screw mechanism that securely connects the dumbbell heads to the rod. The interior can be filled with sand or glass beads to customize the weight according to your needs. Screw Mechanism: Easily assemble the dumbbell heads and rod with a secure screw connection. Adjustable Weight: Fill the interior with sand or glass beads to achieve the desired weight. Child-Friendly Design: Ideal for encouraging children to engage in light physical activity. Customizable: Print in various colors and materials to suit your preferences.       非常适合儿童的轻运动训练。此模型采用螺旋机制，将哑铃头与哑铃杆牢固连接。内部可以填充沙子或玻璃珠，根据需要调整重量。 螺旋机制: 通过螺旋连接轻松组装哑铃头和哑铃杆。 可调节重量: 内部可以填充沙子或玻璃珠，以达到所需的重量。 儿童友好设计: 激励儿童参与轻体力活动的理想选择。 可定制: 可以打印成各种颜色和材料，以满足您的偏好。