Amazon.com : Ferplast Hamster Cage Play Tube | Replacement Wire Port Connector to Connect Play Tunnel to Hamster Cage, Wire Connector 3.15L x 3.75W with a Tube Diameter of 2.4 - Inches,
DIY Hamster Running Tunnel Toy Set Pet Hamster Game Training Outils de jeu pour petits animaux | Fruugo FR
Hamster Cage Connection Board Tube Connector Stretch Resistant for Small Pets | eBay
Ferplast Hamster Cage Play Tube | Replacement Wire Port Connector to Connect Play Tunnel to Hamster Cage, Wire Connector 3.15L x 3.75W with a Tube Diameter of 2.4 - Inches, *REPLACEMENT PART ONLY* - Walmart.com