specifications
wheel:3.50-4
material: caster wheel
rim: metal
N.W.:3.21kgs
advantage
1.light weight
2.high load bear
3.Environmerntal and durble
4.Avoid punctured-tires problem caqused by the conventional air wheel
5.Greter carrying capacity
6.Greater wearability
7.Extre tough and long lasting
8.Sound deadening