... angle is 130 °,and door closing is effective from 90°5 Suitable for the left,right door open and ... Character1 The body is thin and beautiful,used imported spring,can run 50 thousand times2 Used low temperature&resist ... cold3 After special design,control the bearing of the spring hinge,lighten the strength when open and close the door4 ... calibrate zero site.It makes products more easy . Floor Spring