Product review (3 stars): I ordered a pair last year Sep 2014 to use ...
I ordered a pair last year Sep 2014 to use replace the old one on my American Range grill.  We are a restaurant operating 7 days a week 12pm-11pm.  We close for holidays.  That should give you an idea of usage.  By Nov 2015, one of them broke into 5 pieces caused by heat.  I think it should last longer.  The one I purchased from a local store before this lasted me 4 years.  Wonder if the material is weaker?