Always a bestseller Pyrex® items are manufactured from thermal & chemical resistant Pyrex® borosilicate glass. Heavy walled Pyrex® Büchner filter flasks are ideal for vacuum filtration applications. The flask has a side-arm feature which consists of a short glass integral side-arm which is rifled for easy and safe attachment of 9mm bore vacuum tubing (B8A89801 - not included).With tooled neck to accept a drilled rubber stopper and 'studded' base to minimise surface abrasion.Ungraduated with white enamel marking spot.Volume: 1000mlHeight: 230mmNeck Internal Diameter: 45mmPack of 5