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I'm not sure what this is, but it was found amongst other items like metal plates, gears and rotating pieces, motors, lenses and astronomy/lab equipment, but i'm not sure what it was all used for. This is about 8-1/4" long at the base. The sliding part is about 6-1/4" long. The wheel is 3-3/4" in diameter. And this is about 4-1/4" wide. Let me know if you have any questions. Free usps ground advantage shipping Same day shipping cutoff time is 6:00PM EST for most items
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2, 60mm - flat one side, convex the other - still attached to plastic mount.
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will fit onto older keeler ophthalmoscope handle and bulb scratches commensurate with age
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