CritterTrail Accessory Kits offer an easy way to expand any CritterTrail HomeFun and the colorful design keeps your small pet entertained by adding new and different places to play and hide. Expansion kit universally connects to all CritterTrail Habitrail and S.A.M. systems. Accessory Expansion Kit 2 offers a great way to create extra room to roam for your pet hamster mouse or gerbil! Includes: (1) Loop-D-Loop (1) Fun-nel J-Tube (1) Bubble Plug (1) Fun-nel U-Turn (2) Fun-nel Elbows (4) 3.5 Fun-nel Tubes and (6) connector rings. Made in the USA.- SKU: ZX9BCI03072