Kaytee CritterTrail Fun-nel Loop-D-LoopThe Kaytee CritterTrail Fun nel Loop D Loop is a unique expansion for your small pets habitat that provides extra play space and a 360 view of the outside world. Connect additional Loop D Loops to each other to create endless circles of fun! Provides small pets a 360 degree view Connect multiple Loops for endless fun Unscrew twist bolt to separate halves for easy cleaning For hamsters, gerbils and mice Universally connectable to CritterTrail habitats