Delivery Tube - Large U Bend

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.