Dog Kennels,include Exercise pen and Heavy duty exercise pen,etc. Heavy duty exercise pen ,more potion of size,rust-resistant power-coated steel -frame with 1/2 inch tube, connect playpens together to set up-rectangle or octagon shape, suitable for both indoor and outdoor use , sunshade top available upon request. exercise pen includes 6 or 8 panels, made form steel wire, electro zinc plated or black power coated finish , quick and easy setup, sunshade top availble upon request.