This 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 plugand connector setis your essential tunnel paradise accessory.Features-Color: As shown-Material: ABS, Steel-Size:21.20X6.30X1.50cm/8.33X2.48X0.59in- Provide a safe area for curious critters to explore and to promote healthy habits.- You can install them on the pet cage to increasethe fun of hamster activities.-Good toys for your pets, your pets will enjoy a funny and happy playing time.-Can be used outside the cage, easy to install and disassemble without any problems.-Feel free to DIY hamster maze and create an interesting playground for your pet.Packing list1 x Tube Plug1 x Connection Board1 x Big Pliers1 x Set of DIY Tunnels