Function: 1. Adjustable design: the body width adjustment plate is fixed on the back of the fixed frame, 2 width adjustment knobs are sliding mounted in the width adjustment slots, the width adjustment knobs and heel guard are connected by straps, and 2 wheels are swivel mounted on opposite sides of the fixed frame. 2. Improved style: a new third generation of upgraded and reinforced models and a second generation of difference between two points: 1. Original collar surrounded by models on the back of the beam. 2. Both sides of the buckle can be adjusted in height. 3. Lightweight Aluminum Alloy Frame: The dog wheelchair for rear leg frame is made of lightweight aluminum alloy, durable and easy do carry. The stroller will not interfere with the dog's walking. Give them a normal life. 4. 5. Specification: Item Type: Dog Wheelchair Material: aluminum, iron, steel wire, foam, polyester Product Size: Body width: 12-20 cm / 4,7-7,9 inch (adjustable) Body Length: 25-40 cm/9,8-15,7 inch (adjustable) Body height: 19-30 cm / 7,5-11,8 inch (adjustable) Reference chest circumference: 24-40 cm / 9,4-15,7 inch, suitable for animals weighing 4-9 kg / 8,8-19,8 lb Traction rope: approx. 126 cm / 49,6 inch List of packages: 2 x Wheels 1 x Frame 1 x Flange 1 x Body Strap 1 x Traction Rope 1 x Large Screw 1 x Long Screw 1 x Small Screw 2 x Nut 2 x Washer 2 x Hex Wrench 1 x Storage 1 x English Manual 1 x Support Screw