Nunclon™ D cell culture flasks with surface areas from 25 to 175 cm2 are available with filter caps or vent / close caps for good gas exchange. Short, wide neck (angled or straight) allows easy access to entire growth surface. The Nunclon™ D treatment is limited to the intended growth area. Neck areas are not treated to prevent cell attachment and growth in undesired areas. Nunclon™ D surface is certified non-pyrogenic and tested for both monolayer formation and cloning efficiency employing primary cells as well as repeating cell lines. - Sterile. - Material flasks: PS. - Material caps: PEHD. Nunclon™ D cell culture flasks with surface areas from 25 to 175 cm2 are available with filter caps or vent / close caps for good gas exchange. Short, wide neck (angled or straight) allows easy access to entire growth surface. The Nunclon™ D treatment is limited to the intended growth area. Neck areas are not treated to prevent cell attachment and growth in undesired areas. Nunclon™ D surface is certified non-pyrogenic and tested for both monolayer formation and cloning efficiency employing primary cells as well as repeating cell lines. - Sterile. - Material flasks: PS. - Material caps: PEHD.