Ships from Hong Kong. SIZE:52cm(20.4 inch)(adjustable). Material: ABS.Portable design for you to save more space and easy to carry. Can adjust camber, adapt to all kinds of models(bicycle,Stroller) and direction. PLEASE ATTENTION:The part of the installation must be circular tube.Must be between 1.5 ~ 2.5 cm in diameter.The location of the installation site must have a 2.5 cm wide to put the umbrella stand base.Choose me, bring you different experience. Instruction:Loosen hold umbrella stand for fixed head screws, install the support frame in car leading central, the handlebar tube directly to the card into the hold the umbrella stand base hole, in the mount screws, lock the screw of the car fixed base with a wrench. According to the need to adjust the height of the umbrella stand, rotating nuts, can free rotation transform according to the demand of 180 degrees, universal controller can rotate 360 degrees to adjust to the need degree, tighten the screw nut.Finally??Unscrew the umbrella stand nut, m