TC Treated Falcon Adherent Cell Culture Flasks provided by STE-Mart are made of polystyrene (PS) raw materials. The ultra-vacuum plasma surface modification(TC treated) process enhances the adherence performance of the cells, providing more conducive growth environment to the cells. The flask bottom is designed with hollow for the rapid transmission of gas in the incubator. Arc shape bottom and angled neck, can help you to obtain a complete growth surface easily.