Joytech 4.13'' (105mm) Diameter Spinning Top Base Crystal Glass Concave Mirror, Great High End Transparent Surface Double Concave Top Accessory DZ06

Worked well for a while, then broke when it fell from the desk onto carpet floor. Surprised given it was ~75cm drop and nothing protruding onto the glass. Oh well, wasn't expensive, it happens.

This is a great size and has a nice gentle concave for stabilizing most spinners. The raised edges help keep errant spins from flying off the surface and can help a bad spin become a decent one. The glass is clear and clean. The only reason I don't give it 5 stars is there are visible chips and nicks on the extreme edges of the glass. This doesn't affect the spin but for those who are bothered by imperfections, they are noticeable. Even with the slight flaws, I would highly recommend this base!

I read the reviews and I came to the conclusion since some people complained about very minor inconsistencies with the grinding of the edge of the glass so I simply purchased the one with the black frame around the glass. The black edge protects the edge of the glass and in addition it helps create a boundary so that the top is more likely to stay on the glass when you have less than the perfect start up spin. I’m definitely happy with my purchase and this is probably the most reasonably priced concave glass lens that I’ve been able to find.. End it comes beautifully packaged in bubble wrap inside of a nice presentation box.

I actually like this. I can spin my gyro and, unless I stupidly spin it quite wildly, it will stay on this platform and center itself even on unlevel surfaces.

My package arrived today December 13th it's perfect, I get a longer spinning time for hour's of fun.