Bike trailer. Very light weight. Can be used for a dog, cat, groceries, tools etc. Made of aluminum and pvc. Has a net that covers it to keep pet safe from jumping out or from you losing your items. Very strong and easy to tow. Moving and can not take with us. Awesome Item well worth it. Make an offer. Interior dimensions are 20 1/2 " wide , front to back is 32 " , height is 23" this is in the interior of the cart. The cover can be removed from the top to make it convertible.