German imported special rubber, high density, no deformation, the roller will not be deformed due to weight due to time during the load process, even if it is deformed, it will automatically resume its function, so it is called a special memory roller.

德国进口特种胶，密度高、不变形、轮子在承载过程中不会因重量因时
间而变形，即便变形也会自动恢复使用功能，因此叫特种记忆滑轮。