Alfie Pet by Petoga Couture - Fred Collapsible Tunnel Toy for Cats The expanded tunnel measures 19.75" long and 10" diameter for the entrances. The cat tunnel is expandable and collapsible for easy storage. It pops up/retracts easily, offering portable, lightweight fun anytime. Lined with rustling material that creates interesting noises for pets. Interactive tunnel for your cat to play and hide and an ideal place for your pets to get freedom and room to exercise and stretch. Seemingly endless tunnel cat toy crackles curiously with every step. Cats can't resist crawling inside the mysterious interior.