Here is this tube is no longer safe to use (the SV19 is better; here is 40-622 on unterern end).
We are already 2 hoses burst at the weld seam (approximately 40-50cm in length; like a balloon - Puff!). The air was out in about 3 seconds.
Other hoses are no longer flickbar by faulty the weld seam:
10min after inflation breaks the weld at the next location.
After "bad luck" with about 4 of 7 hoses I am now switched to SV19 ...
