1.Please install the door according to the correct specification.2.Don’t destroy the center, don’t open the door more than 120 º, otherwise it will destroy product and produce risk.3.Using screws to adjust the velocity and just find tuning will achieve the effect, over adjustment will cause oil leaking.4.Please make sure the left and right directions during installation, otherwise will cause serious consequences.5.Our company will be not responsible for the compensation of the loss made by anymentioned above. Please read the notes carefully for the benefit.