Polystyrene construction is stable from 4 C to 60 C
Frosted writing patch provides a space for easy labeling
Two-position plug seal caps and vented caps are made of biologically inert, high-density polyethylene to provide a chemically resistant surface
Molded graduations along both sides of flasks allow quick volume estimation; graduated at 5mL increments to 50mL
Prominent stacking rims along perimeter of upper surface permit easy interlocked stacking in incubator or culture hood; flasks will not slip off one another while being transported
