▲: wheel interface has adopted a plug-in type.This is convenient for loading and unloading, to avoid loosening of the problem of the conventional nut type, long life.
▲: the entire surface of the stool is thick, a full, does not have a sense of "a single thin".Use the high density of the rebound sponge.Sponge is full of material, it does not sit.
▲: the surface of the stool is, we can be a one-time forming cotton of high quality.There is elasticity and pressure resistance characteristics, not a long period of time deformation.
▲: chassis with a thick steel, load resistance is strong, there is durability and durability.
▲: The design was inserted into the wheel, can be extended easily decomposed to life the wheel
