Material:

1.It is made of engineering plastic PP material, with light quality, shock resistance, pressure and moisture resistance.

2.The wheel is made of PU and PA material, non-toxic, environmentally friendly, wear-resistant and noise reduction.

3.The use of bimetal bearing greatly reduces the friction high temperature when the wheel turns, the static effect is good, the service life is longer.

Quality Test：

Each product pass QBT2155-2010 national standards and other tests.