4 PVC "Inner Tubes", 2 @ 2m + 2 @ 4m so suit 5-6m boat (approx).
Stored for some time but inflated today and all seams well. Will leave inflated to test!
These were supplied by "Gemini" (www.geminiindustries.co.uk
) and came with a boat I had a few years ago. They worked well for a season before we retubed her. The previous owner also had a season with them.
2 of the the inner tubes had to be patched as water was getting into the bottom of the rear outer tubes and the pressure build up damaged the inner tubes. I dont beleive the other 2 are patched. But word of caution, make sure no holes under the water line when using these.
More info and measuring detial here:
So in summary used, and patched, but may well get someone afloat for the spring while they save up for a retube.
Price new seams to be about £500.
Offered to RIBnet'ers for £100. Can courier at cost (say £20). I also have a PVC tube repair kit I will throw in FOC (unopened).