1.The body is thin and beautiful,used imported spring,can run 50 thousand times.

2,Used low temperature &resist freeze hydraulic pressure oil,keepthe door smooth when it is -40 degree cold

3,After special desgn,control the bearing of spring hinge lighten the strength when open and close the door 

4,High strength and leak prevent configuratiom were used for extend the lift of it.As it can aviod mangle and oil leak by strength or strong wind from outside.

5,Cament box can be adjust 5mm length and 5 mm width,portrait adjust more or less 2 degree when calibrate zero site,It makes products more easy.