The Black E-Coat Exercise Dog Pen is easy to set up and requires no tools. A long lasting E-Coat finish has been applied for strength and durability. Ground stakes are included for added stability. The exercise pen is available in your choice of 4 heights. All models come with 8 panels and each panel is 2 foot wide. The wire mesh opening is 1 1/2" x 6" and is constructed of hefty 9 and 11 guage wire. The Black E-Coat Exercise Pet Pen may be set up in the traditional octagon design or, if you are purchasing a sun shade cover, you may set it up in a square configuration. All exercise dog pens easily fold flat for storage or transport.