Conical Flasks Screw Cap and without caps made of Polypropylene: A PP conical flask with a cap has secure caps that ensure air-tight closure, making them ideal for storage, transport, or long-term sample protection. PP is highly resistant to chemicals, making it great for avoiding sample contamination or deterioration. Conical Flasks are made of Polypropylene, these cone-shaped flasks are rigid, translucent & autoclavable. The screw cap keeps the contents of the flask contamination free and makes the flask leak-proof. Threads should be disengaged before autoclaving. Material: Polypropylene Brand: PolyLab Other sizes are available as per the table below. Contact us for further information. Item Code Capacity (ml) P38101 with threaded cap 100 SE.LW2717-02 Narrow mouth without cap 100 P38102 with threaded cap 250 SE.LW2727-02 Narrow mouth without cap 250 P38103 with threaded cap 500 SE.LW2737-02 Narrow mouth without cap 500