Made of high-quality borosilicate glass, which is strong, durable and heat-resistant Provides a Lab Filtration Unit, including a 1000mL filter flask, a 300mL graduated funnel and an aluminum clamp Be compatible with 42-60mm membrane filter paper Commonly used in industrial and academic laboratories for filtering particles, bacteria and other substances Good pressure and sealing performance, all according to international standards Specification: Materials: borosilicate glass, rubber, aluminum Diameter of Sand Cone: 40mm, 40mm is also the inner diameter of the filter joint. So you have to choose the membrane filters of larger size than Diam. 40mm. Filter Flask Capacity: 1000ml Graduated Funnel Capacity: 300ml (50mL graduations for quick, easy measurement) Height of Flask: 23cm Bottom Diameter of Flask: 13.5cm, Height of Funnel: 12cm Funnel Top Diameter: 8cm; the filter is 12cm high. Package Includes: 5 Pieces 1000mL filter flask 5 Pieces 300mL graduated funnel with lid 5 Pieces aluminum clamp (above 3 pcs are all packed in one box) Note: The item does not include filter membrane papers, please purchase separately. Diam. 50mm filter membranes are available in our shop.