Clear Borosilicate Glass for 3D Printers, Round 170mm, 3mm Thick, Boro Glass

The glass works great in my Mini Kossel. My only complaint is the uneven thickness. There is a .4mm difference from one edge to the other. I recommend that you put a reference mark on the glass and on your printer so that it is always in the same orientation. It will make your calibration much easier.

I use this plate on top of my heat bead on my Kossel Mini 3D printer. Has worked great.

It's round and flat and made of borosilicate glass. The edges are nicely polished. It works great as a build platform. Currently I use it with blue painters tape, but will be converting it to a heated bed soon. It has also withstood some abuse as I was testing and calibrating my printer and it came out fine to my relief!

Haven't finished my 3D printer but the glass is very high quality and no sharp edges. Once leveled, I should be able to print PLA directly on the glass with no issues. Recommended for Kossel mini or Richrap 3DR. 170mm is about 6.7" diameter that is a pretty large print area for a small 3D printer.