Rapid ECH0457C Funnel Powder is an industrial quality powder funnel made of polypropylene plastic. Excellent for transferring powdered or liquid reagents. Funnel measures 4.1" in total length and 4" in diameter. Stem is 1.3" long and has an outer diameter measuring 20mm. Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use. Autoclavable, with superior chemical durability and heat tolerance. Can withstand temperatures ranging from -20°C to 135°C.