What are the spec. for Vinyl?, that is 1 being the weakest and 10 been strongest.?

Question

Comparing vynil thickness of water beds before purchasing, current being grade 24 mil.

Answer 1

Consumer Reports generally have a good test of popular home items:
http://www.consumerreports.org/cro/index.htm

Also try:
http://www.consumersearch.com/

and:
http://www.ifg-inc.com/