DescriptionThis is a tunnel plug and connector set designed for your pets to play and exercise.If you want to build a tunnel paradise for your baby hamster, then this tunnel plug and connector setis your essential tunnel paradise accessory.Features- Tube Plug and Connection Board Color: Pink, Blue, Green.- Pliers Color: Yellow.- Material: Plastic.- Size: Approx. 9.50X8.00X0.30cm/ 3.73X3.14X0.12in. - Used for dwarf hamsters, hamsters, gerbils, mice or other small animals.- Install this interface plug at the end of the tunnel to prevent your hamster from running out and getting lost.- Plastic material, safe and durable for long serving time. You can DIY at will, enrich your pet's home.- The small hole on the external buckle plug can make the tunnel full of oxygen, and will not make your baby hamster appear hypoxic in the tunnel.