IRIS 4 6 Panel Dog Exercise Playpen with Door, 24 in, Black, 4 panel SmithBuilt Premium 8 Panel Black Dog Exercise Play Pen with Door and 4 Panel 24 Inches Dog Playpen Pet Exercise Pen With Door,Black Dog Playpen,24 32 40 Inch Height in Heavy Duty,Folding Indoor Outdoor 24 30 36 42 48Inch Pet Dog Playpen 8 Panels Puppy Folding Dog Exercise. The IRIS 24'' 4 panel dog exercise playpen with door can be used in dog play yards and as a play gate, small dog fence, and more. The IRIS playpen is portable and provides 8 square feet of play space for dogs, cats, and other pets. Pet playpen with door is made of durable molded plastic. Purchase IRIS add on panels to create an even larger pet playpen. The IRIS dog exercise pen with the door is made in the USA. Playpen with door is perfect for puppies, extra small to medium sized dogs and other family pets.