These zip ties aren't bad, but given the Premium Heavy Duty label, I expected better performance. The failure rate is around 15-20% of the 210 or so (out of 250) I've used so far; Most of this is the inability of the "teeth" to face each other. Sometimes this happens when pumping. Other times they don't start from scratch. I've also had a few breaks where I pulled or tightened the zip tie. However, I expect this to be typical performance for a standard cable tie. UPDATE: I have to say that PenguinFBA's customer service is excellent. They really took care of the issues I had with these zip ties. I have adjusted my rating from 3 to 5 stars. I hope their customer service methods are contagious. UPDATE 2: I found the same initial issue with replacements posted by PenguinFBA. although not with the same failure rate as the first order.
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