The Aosom Pet Bike Trailer is a great way to maintain an active lifestyle for your small to large pets. This pet bike trailer can be setup in minutes. To attach the trailer to your bike you simply attach the bike hitch to your rear wheel axle, then slip the arm onto the hitch and attach the pin and safety strap. The mesh zippered screen on the front and back, and the meshed windows on the side allow for maximum air flow for your pet. To protect your pet from the rain a clear plastic cover is included for the front door. FEATURES: – Heavy-duty, water-resistant polyester fabric on a sturdy steel frame, – Quick release wheels, – Dual entry (front and back) design for easy loading of your pet, – Easily assembles and folds down for storage, – Roll up clear plastic cover for front door, – Mesh zippered screen front and back, – One Aosom type “A” bicycle hitch included, – Leash hook inside to attach to safety leash, – 32″ long safety flag. SPECIFICATIONS: – Overall dimensions (without tow bar): 31″L x 28″W x 35 1/2″H, – Max loading weight: 66 lbs, – Trailer Weight: 30lbs, – Tires: 20″W x 1 3/4″ Thick, – Interior dimensions: 31″L x 22″W x 25″H, – Folded overall: 31″L x 28″W x 19 1/2″H.