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yes they do, however the spacing between holes in the cage can be off. Best to stick to one or the other, but it is useful connecting savic tubes with the t junction ferplast tubes. Ps. if you have a syrian hamster the 6cm diameter of the ferplast tube is wide enough (but the 5cm rotastak is a bit small), but the savic is just smaller than 7cm. Hope this helps.

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14y ago

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