Hello Paupasme,
I haven’t tested this but I would expect almost certainly they would not work. The peristaltic pumps are designed around a very specific dimension of tubing and if you depart from this by about more than 0.1mm they can either jam and not turn (if tubing too thick) or not make a sufficient seal and hence not pump (if tubing too thin). I would therefore strongly recommend getting the 2.5×4.5mm dimensions specified.
Harrison
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