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Ed,
one is a Kendrick, I know that much. The others are "unlabeled" no idea of the brand, can't even recall where the heck I bought them, but I'm sure I bought them new. The Kendrick I used on any refractor that was about the 5-6". The longest has seen little if any use, and the smaller pair have been used off and on for camera lenses, small refractors etc.
Gary
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