The Bel-Art Scienceware 147510000 thistle tube funnel has a wide top and thin stem for filling burettes, flasks, and small containers. It is constructed of polypropylene so that it is chemical-resistant and shatter-proof. The inside diameter of this funnel is 27mm (1-1/16"), the outside diameter top flare is 41mm (1-5/8"), the stem diameter is 6.4mm (1/4"), and the stem length is 254mm (10"). This item can be sterilized with an autoclave at temperatures up to 121 °C (250 °F). It comes in a pack of 12 funnels. Bel-Art Products manufactures scientific products, including labware, testing equipment, and safety supplies, under the Bel-Art and Scienceware brands. The company, founded in 1946, is headquartered in Wayne, NJ. Research, industrial and healthcare professionals rely on SP Scienceware for their sample handling needs. Sold worldwide, Bel-Art and H-B Instrument brand laboratory supplies include over 5,000 items from safety wash bottles to fume hoods, thermometers, racks, desiccators, hydrometers, ice buckets, scoops and spoons. Custom calibration services, plastic molding, specialty coatings and wire manufacturing are also available. Wilmad-LabGlass brand laboratory glassware complements Bel-Art and H-B Instrument with over 7000 items including NMR and EPR consumables and specialty glassware, as well as custom fabrication for individual glassware, glass repair services and OEM glass parts. SP Scienceware is a division of Warminster, PA based SP Industries which also include SP Scientific laboratory, thermal management, and pharmaceutical production equipment and SP Ableware aids for daily living.