We have also made updates to our Draw Down Belts over the years.  Our most recent updates include switching from rubber to Linatex and using molded instead of spliced belts.     
 
Linatex is a material that is stronger than rubber and has way better grip.  If you firmly rub your thumb against a rubber belt you will notice the appearance of small rubber balls on the belt.  These balls end up getting sucked in to the vacuum system and can do some damage over time.  The chemical makeup of the Linatex material makes this much less of an issue.  Linatex also accepts a wider range of coefficient of friction which means it will work with a wider range of film.  If you have problems pulling your film with our basic belt then let us know.  We actually have 3 different types of belts that have increasing amounts of grip.      


Most belts have a splice in them requiring you to install the belt in a particular direction.  When installed incorrectly the belts will quickly tear apart at the splice.  Our newest belts are molded meaning there is no splice.  The belts can be installed in any direction which reduces the opportunity for mistakes.