Designed for use with Whatman glass microfiber filters in water testing and for biomedical, microbiological and clinical chemistry. Base, stem, and reservoir are made of borosilicate glass with ground contact flanges. A plastic chemical-resistant clamp provides a leak-tight seal. Filter support plates are replaceable, made of transparent acrylic, and are ideal for most aqueous solutions and some dilute acids at working temperatures to 65°C maximum. For higher temperatures or special use, optional polypropylene plates are available. Comes with acrylic filter support plate and three clamps.