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Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use - ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments in schools and universities. Size: 6mm O.D., 4mm I.D.
Q = Do these fit into the holes in the rubber stoppers?A = Yes, the tubes are 6mm OD and the stopper holes are approx. 5mm diameter on the larger sizes and 3mm diameter on the small sizes.
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