Avantor polystyrene serological pipets deliver accurate, liquid measurement and transfer for cell culture, biopharmaceutical and general laboratory workflows. Precision‑moulded from optically clear, high‑grade polystyrene, each disposable pipet is calibrated to deliver and has bold, black ascending and descending graduations for easy volume tracking. Colour‑coded rings at the top and matching print on the barrel simplify volume identification; negative graduations provide extra working volume and the pipets are accurate to ±2 % at full volume. These pipets are manufactured in accordance with ASTM E‑934 for disposable plastic serological pipets. To support aseptic technique, each pipet is individually wrapped in paper/plastic packaging that reduces static cling. The packaging keeps pipets ready for use while improving efficiency for media preparation, reagent transfers and sample dilutions. A universal plug‑in or tapered tip design ensures compatibility with most pipet controllers. With their 25 mL capacity, these red‑coded pipets are ideal for larger volume transfers; they are available in other sizes (1 mL to 50 mL) for diverse liquid‑handling tasks. Each bag contains 25 pipets, and the 25 mL size is packaged 200 per case. Made in the USA, Avantor serological pipets provide consistent performance for cell‑culture, clinical and research applications