I ordered some new sliver thera-band and found the product is not the same as it has been and here is the answer i got
In regards to our exercise tubing... yes, back in 2011, a change was made to all the exercise tubing and exercise bands.
We had made all of our bands and tubing so that they were now consistant in pull strengths when changing from color to color.
The silver tubing went from: .2 x .45 x .125 TO .2 x .4 x .1
Customer Service Representative
The Hygenic Corporation
1245 Home Ave
Akron, Ohio 44310
Toll Free: 800-321-2135 ext 437
Have you changed the diameter of the silver thera-band ?
I just received some and it is 3/8 inch outside diameter and the old is 7/16 inch diameter