At the new gym in Akureyri, Iceland, they have the length of safety strap marked on each. This one is 26.5cm long.
Smart.
… It also has the other system, a (meaningless to me) #5.
more photos of the Akureyri facility.
In the U.K., Gymnastics Express sells “Bar Loops” both sized and expiration dated:
… stock sizes are from 23cm to 36cm but typical sizes are often around 28cm. Computerised sewing (as in seat belts) ensures consistent safe performance. It’s not only the quality webbing that matters in a product like this, but the stitching too.
When subjected to laboratory testing they exceeded 1 tonne breaking strain per loop. Interesting to note that the incredibly strong webbing broke before our stitching. It is reassuring to know the stitching was so secure!
Coaches please note; as with all equipment, these straps will wear. Before every use they must be carefully examined and discarded as soon as wear is evident. Either way, they are now marked with a “use by” date, 1 year from purchase.
Not all straps need to be discarded after 1yr, of course. It depends on use.
Thanks Full Twist for that link.
Gymnastics Coaching.com 