Pyrex^® gas-washing bottle with fritted disc

Pyrex^® gas-washing bottle with fritted disc, capacity 500 mL, stopper joint: ST/NS 40/50

Pyrex^® gas-washing bottle with fritted disc, capacity 250 mL, stopper joint: ST/NS 40/50

Pyrex^® gas-washing bottle with fritted disc, capacity 125 mL, stopper joint: ST/NS 40/50