Autoclavable Plastics - Contact clear polypropylene Working Volumes - 100 mL for 300 mL flasks (150-200 rpm for 2 in. throw) High 02 absorption rate achievable by unique baffle and turbo-vane closure design. CAP-fLO(TM) closure with DRI-GAUZE(TM) filter lining provides uniformity and consistency in gas diffusion. flasks closures filters or membrane linings are sterilizable by autoclaving. Wide-mouth opening allowing easy access for media preparation harvest and cleanup. Barrel-shaped design provides wide vortex and more operational capacity than conventional Erlenmeyer flasks. Slip-on closure protects flask neck from airborne particles and eliminates the need for flaming. Provides better culture growth and productivity than Erlenmeyer flask. Caps are not included with flasks .CAP-SIL(TM) closure with silicone membrane lining minimizes evaporation. 300 mL flasks for front-line culture development studies. 2.5L flask for production studies equipped with a handle.