Sturdy versatile Crates come with Heavy duty aluminum frames and composite panels.Pre-assembled front and sides and All tools and hardware come included for the remaining assembly. Assembles in 15 to 20 minutes. Pro Series Crates can be opened with one hand always leaving one hand free for your pet The self-lubricating hinge system reduces noise. Rounded edges protect pets and your vehicle Comes with pre-mounted Gravity assist adjustable doors and key lock system Great For Use Inside or Out. Includes All Tools & Hardware.  Easy to Assemble with Pre-mounted Doors, Front & Sides. Large:     31.5" W x 29.5" L x 26" H. X-Large:  31.5" W x 35.5" L x 26" H.