BILLY Height extension unit, birch veneer, 32x11x14" - IKEA
DIY Hamster Cage | Double Billy Cage (Read Description Below Before Building) - YouTube
Hamster cage – Cutting's Corner
BILLY Height extension unit, birch veneer, 32x11x14" - IKEA
DIY Hamster Cage | IKEA Billy Cage - YouTube
IKEA Billy Cage | hamsters
Why would there be an extension option for the tall BILLY but not the short one? I bought the extension in the clearance section, already assembled, so no hardware came with it.
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