The Aosom Pet Bike Trailer is a great way to maintain an activelifestyle for your small to large pets. This pet bike trailer can besetup in minutes. To attach the trailer to your bike you simply attachthe bike hitch to your rear wheel axle, then slip the arm onto thehitch andattach the pin and safety strap. The mesh zippered screen on the frontand back, and the meshed windows on the side allow for maximum air flowfor your pet. To protect your pet from the rain a clear plastic coveris 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 - Removable 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 Specs: - Max loading weight: 66 lbs - Trailer Weight: 32 lbs - Tires: 20" x 2.125" - Interior Dimensions: 31" deep x 22" wide x 25" tall - Overall dimensions (without tow bar): 31" deep x 28 1/2" wide x 351/2" tall