PTFE Covers&WacthGlass 20mm

PTFE Covers&WacthGlass 20mm
Diameter 20 mm
Item01968-AB
AvailabilityIn Stock
$4.81
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 30 mm Diameter
Diameter 30 mm
Item01969-AB
AvailabilityIn Stock
$4.73
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 40 mm Diameter
Diameter 40 mm
Item01970-AB
AvailabilityIn Stock
$5.08
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 50 mm Diameter
Diameter 50 mm
Item01971-AB
AvailabilityIn Stock
$5.73
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 65 mm Diameter
Diameter 65 mm
Item01972-AB
AvailabilityIn Stock
$7.14
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 75 mm Diameter
Diameter 75 mm
Item01973-AB
AvailabilityIn Stock
$8.77
PTFE Covers&WatchGlass 80mm
Diameter 80 mm
Item01974-AB
AvailabilityIn Stock
$9.83
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 100 mm Diameter
Diameter 100 mm
Item01975-AB
AvailabilityIn Stock
$13.36
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 125 mm Diameter
Diameter 125 mm
Item01976-AB
AvailabilityIn Stock
$16.10
SPI Supplies Brand PTFE Beaker Covers and Watch Glasses 150 mm Diameter
Diameter 150 mm
Item01977-AB
AvailabilityIn Stock
$25.52

All SPI Supplies Brand PTFE beaker covers, which can also be used as watch glasses, are chemically inert, non-contaminating, and are thermally stable in the range of -200°C (390°F) to + 280°C (+536°F). The beaker covers also have a "super smooth" finish making it virtually impossible for anything to "stick" to the surface of these fine laboratory products, making them very easy to clean up for reuse in another experiment. They are especially useful during digestion procedures where it is important to contain the liquid in the beaker. Make sure you understand why we can no longer call these Teflon® beaker covers and must refer to them only as PTFE beaker covers.

  • Cover Diameter: 20 mm
  • Fits beaker: 1 ml

Details of the manufacturing:
The beaker covers are pressed from pure virgin PTFE resulting in a highly inert material, one that will stand up to nearly every way one might want to use it. The super smooth finish means that virtually nothing will really stick to the covers.

Cautions about over heating:
PTFE beakers can not be taken to temperatures as high as glass. The user has to be sure they do not overheat PTFE beakers or their covers. If PTFE is overheated, especially in air, it can start to break down by both thermal decomposition and oxidation, resulting in fumes of HF which should not be inhaled under any circumstances.