I bought several different Teslong borescopes about a year ago through Amazon.  I was very impressed with not only the products, but the customer service and the company as a whole.  

They were (assuming still are) always looking for suggestions to improve their products.  I haven't kept up with the exact changes as they occurred, but I looked recently at their products on Amazon and noticed that they not only have totally new products, but the items that I purchased roughly a year ago are now improved upon in small but very useful ways.

I reached out to them Monday through Amazon asking if it was possible to buy a particular part that wasn't available when I bought my borescopes without having to buy a complete set-up.  The response was great and the part has already shipped.  

I normally don't take notice to all of the companies advertising at the top of the forum but tonight I happened to see Teslong was advertising here now...no clue when that stared either.

I don't do kiss ass reviews, like this one is likely coming across as being, and I'm getting absolutely nothing for posting this thread.  I'm just very impressed with the quality of their products and the affordable prices.  But what is really beyond the normal is the customer service and the actual interest the company has to continually improve their products based on customer suggestions.

Fanboy review over.  

MJH1, Hey man that's great to hear! We are all in on gun borescopes and servicing the gun community. We have more products in the works and some incremental improvements as well. If anyone needs any help with their Teslong product, just call our customer service line (877-899-8809) 9-5 PST. they are located in Southern California, and we will take care of you. Cheers!

I agree with both of those statements. I am not sure when they became a sponsor here, but glad they did.

As for the second portion, I agree 100% with you. I use their endoscopes for maintenance and servicing on offshore platforms. We can check the impellors on pumps without having to take everything apart. Just remove a plug and send the scope in to see. Same with our turbines, we can remove a plug and send the scope in on the hot or cold side without having to tear it apart. Saves us both time and money.