Kaleidoscope Making Parts, Crystal Clear Balls

Kaleidoscope Making Parts, Crystal Clear Balls.
Great for teleidoscopes.
Very Clear and very nice and clear.
No Known Flaws in the glass.
Made for the laser and Fiber optic industry these are called Spherical Collimating Lenses
The prices each reflect they are indeed lenses and not just Crystal Balls or not just Clear marbles.