Richell Convertible Indoor/Outdoor Pet Playpen: * The indoor dog playpen is recommended for small to large dogs 6 to 88 lbs. * 1-1/4" space between plastic slats * Specially designed "hook arrows" allow the playpen to be used indoors or outside * Lockable gate door provides extra pet security and easy mobility * Durable blow-molded plastic construction * Panel designed to allow for various size configurations * Easy to clean; easy to assemble; instruction manual included