Concave circular glass used as an evaporation surface for liquids, to cover beakers, or to hold solids when being weighed. Fire-polished edge 1.2 mm minimum thickness Diameter tolerance ±1 mm Manufactured from 90 expansion soda-lime glass conforming to USP Type III requirements

41mm ribbed watch glass fits all 50mL digestion vessels. Polypropylene construction is naturally free of contaminants. Ribbed design allows partial reflux during digestion. Watch glass has a center stem to aid in handling. Pack of 1000 caps.

Meets EPA requirements for methods 3005, 3010, 3020 Fast, easy clean-up Save time, trouble and expense! No need to spend extra time and money having cane sealed to regular watch glasses in order to meet EPA specifications. 100% reliable molded-in ribs cannot pop off, eliminating the need to make…

Product Dimensions (l x w x h) : 0x2.354x0.366in Watch Glass. Polypropylene . 60 mm diameter. Provided with a stable base and made of chemically resistant polypropylene. Will withstand temperatures up to 120ºC. May also be used as beaker covers.

For covering boiling solutions Fire-polished edges concave shape Can be used on funnels, dishes and jars

Made from soda lime glass (1.8 mm thick), fine ground and flame polished edges.

Chemware® Teflon® TFE Unbreakable in oridinary use Surface is not wetted by water and is nonadherent to most materials Smooth finish resists contamination Can be used at temperatures from -265 to 315°C. Listings indicate watch glass diameter.

Unique ribbed watch glasses are designed to fit DigiTUBEs (catalog number 010-500-261) and Teflon® tubes (catalog number 010-500-066) to help promote gentle refluxing. Manufactured using virgin polypropylene with ultra low metal content.

Concave Clear Annealed Glass Covers Used To Return Condensation to beakers Fired-Polished Edges