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The vendor advertises these collars as suitable as replacements for those that accompany collars that come with Dogtra, Tritronics, etc devices EXCEPT that typical electronic training device collars are ONE inch wide and not 3/4" wide as these collars actually are. Of course a 3/4" wide collar will fit a 1" wide opening - but the narrower collar will NOT provide as secure a fit and further, due to width, a 3/4" wide collar will be less comfortable on the dog. I can use these collars for other purposes so I'll not return them but anyone who orders these as replacements for collars that typically come with electronic training devices will be disappointed on account of width.
Originally, we put the training device on a regular collar, but I saw this and thought it would be easier. Not so much. One, the material is very slippery. Two, if your dog is smaller and in between the hole sizes, its more difficult to get it to fit. Three, when our dog scratched, he was able to move the collar by catching his nails in the holes (quite easily, which was shocking). As I stated, my husband stated, from the start, he hated it: the texture, the way the trainer slid around on it, everything. After a few weeks, I gave in and put it back on a regular collar. It's a great idea in theory, but it didn't work out for us.
About the collar as a replacement for the original collar. But the same thing happened to this one. It only lasted about a couple of months before it started cracking. Soon the plastic coating came off and it kept coming off my dog as he played. I liked the orange color because it was bright enough to see in the yard when it did fall off, but I thought the object of the color was to stay on and be useful. Was disappointed in this collar.