These are made with special PVC with a non lead content. It is food contact approved USA, FDA contains no Phenol, no heavy metals, no phthalates and can be recycled. Not normal over the counter PVC. They are made with super suction , Dual suction cups and can swivel from side to side for easy use and transportation. Take them anywhere with your bird.

Small- 9" x 9" x 9" - 3/4" Perch Diameter
Medium- 10" x 10" x 10" - 1 1/4" Perch Dia.
Large- 15" x 15" x 15" - 1 5/8" Perch Dia.