Made of high-quality borosilicate glass, which is strong, durable and heat-resistant Provides a Lab Filtration Unit, including a 500mL filter flask, a 300mL graduated funnel and an aluminum clamp Be compatible with 47-60mm 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: 42mm, 42mm is also the inner diameter of the filter joint. So you have to choose the membrane filters of larger size than Diam. 42mm. Filter Flask Capacity: 500ml Graduated Funnel Capacity: 300ml (50mL graduations for quick, easy measurement) Height of Flask: 19.5cm Bottom Diameter of Flask: 11.5cm; Opening Diameter of Flask: 2.7cm Height of Funnel: 12.5cm Funnel Top Diameter: 8cm; the filter is 12cm high. Package Includes: 1 Piece 500mL filter flask 1 Piece 300mL graduated funnel with lid 1 Piece Sand Core Filter 1 Piece aluminum clamp (above 4 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.