What's in this patch kit? I have a patch kit (from Bike Hand) and it includes:



Rubber solution


Metal rasp


Patches


Along with the aforementioned supplies there are two small rubber tubes, hollow, and about 1cm long.  What are these and how would one potentially use them with the patch kit?
The little rubber tubes are for repairing Woods/Dunlop valves. The valve core does not have any valve mechanism in itself, but relies on the little rubber tube to seal. The tube fits over rounded end of the valve core shown below.



Most of new tubes come with similar-looking valve that has a ball and spring mechanism instead of the rubber tube.