Borosil Reusable Class B Mohr (Measuring) Pipettes are graduated using a permanent amber treatment that will not blur, wear, or wash off even after long-term use. Manufactured with consistent wall thickness. Reusable. Uniform inner bore diameter for accuracy between different readings. Beveled tips resist chipping. Pipettes can be autoclaved and, if necessary, flame-sterilized. Borosil Mohr Pipettes are graduated for delivery from the zero mark to the final graduation mark. Borosil Class B Mohr Pipettes comply with EN ISO 835. Available from 0. 1mL to 25mL. 1mL, 2mL, and 5mL sizes available in two different graduation intervals. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust, Borosil Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices.