Bel-Art Single Scale 50ml Polypropylene Graduated Cylinder; 1.0ml Graduation (F28454-0000) Graduated every 1ml with raised numerals for easy reading Flared top rim and large spout facilitates pouring 0.9" I. D. x 7.9"H Polypropylene is chemically resistant and autoclavable at 121C (250F) Octagonal shaped base prevents tipping and rolling