PTFE Beaker Covers and Watch Glass

PTFE Beaker Cover and Watch Glass - 20mm
Diameter 20 mm
Item01968-AB
AvailabilityIn Stock
$5.09
PTFE Beaker Cover and Watch Glass - 30mm
Diameter 30 mm
Item01969-AB
AvailabilityIn Stock
On Sale
$5.96 $3.40
PTFE Beaker Cover and Watch Glass - 40mm
Diameter 40 mm
Item01970-AB
AvailabilityIn Stock
On Sale
$7.25 $3.50
PTFE Beaker Cover and Watch Glass - 50mm
Diameter 50 mm
Item01971-AB
AvailabilityIn Stock
$8.04
SPTFE Beaker Cover and Watch Glass - 65mm
Diameter 65 mm
Item01972-AB
AvailabilityIn Stock
$8.53
PTFE Beaker Cover and Watch Glass - 75mm
Diameter 75 mm
Item01973-AB
AvailabilityItem Not Available
PTFE Beaker Cover and Watch Glass - 80mm
Diameter 80 mm
Item01974-AB
AvailabilityItem Not Available
PTFE Beaker Cover and Watch Glass - 100mm
Diameter 100 mm
Item01975-AB
AvailabilityIn Stock
$13.81
PTFE Beaker Cover and Watch Glass - 125mm
Diameter 125 mm
Item01976-AB
AvailabilityIn Stock
On Sale
$20.70 $4.00
PTFE Beaker Cover and Watch Glass - 150mm
Diameter 150 mm
Item01977-AB
AvailabilityIn Stock
$32.72

All SPI Supplies 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.

Cautions about over heating:

PTFE beakers cannot 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.