Eisco Buchner Funnel, 13Cm I.D. - Polypropylene, 2 Parts -, 12.5Cm Filter Paper Product Details Polypropylene plastic Büchner Funnel is both light weight and autoclavable. The funnel is in two parts; the top portion can be fitted with the lower one, forming a vacuum seal which does not require greasing. Base of top portion has a perforated filter plate. Designed for filter paper from 11cm to 12.5cm diameter (not included). Measurements: Mouth inner diameter: 130mm Assembled length: 210mm Stem length: 85mm Stem inner diameter: 20mm 2 PARTS || Büchner funnel with straight sides, two interlocking parts and a perforated filter plate is made of high quality polypropylene SEPARATION || For use in filtration (separation of solid matter and fluid) - Two parts combine forming a vacuum seal which does not require greasing USE 11 - 12.5CM FILTER PAPER || Filtration paper required but NOT included - Best with 11 to 12.5cm filter paper - Moisten filter paper with a liquid to prevent initial leakage MEASUREMENTS || Funnel stem measures 85mm (3.3 inches) with an inner diameter of 20mm (0.8 inches) - Fully assembled funnel measures 210mm (8.25 inches) in length with an inner diameter of 130mm (5.1 inches) MULTIUSE || Often used in combination with a Büchner flask (CH0422C01), Büchner ring and sinter seals Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.