Merax Folding Cat Dog Pet Carrier Stroller Three-Wheeled and Four-Wheeled (Black, Four-Wheeled) Overall size:32L X 18W X 40H, the pet house:21W X 13.4L X 21.7H.Weight capacity :30lb .Front wheel diameter:5.5; Back wheel diameter:7.5 Two hands folding system can fold quickly for easy storage and carriage Materials:iron tube, silver frame,black plastic,300D oxford fabric 360 - degree rotating wheel for easy push and pull Designed with cup holder and storage basket for pet supplies