High-quality watch glass with machine-ground edges. Watch glass has many uses around the laboratory including covering beakers to prevent evaporation or use as a shallow culture dish. Sold in packs of 10.
  • Small = 70mm covers beakers to 200ml
  • Medium = 100mm covers beakers to 600ml
  • Large= 150 mm covers beakers to 2000ml
*** Please note: Edges are machine ground, not fire polished like a beaker or test tube rim. The fine-grit machine grinding does make the edge very smooth and safe for handling, but it will contain slight cosmetic blemishes.  *** Metric Equivalents: 28ml = 1 fluid ounce 25mm = 1 inch Metric Conversion Calculator