Graduated transfer pipettes feature molded-in graduation marks that will never fade or wash off. They offer excellent resistance to diluted and concentrated acids, alcohols, bases, and esters, good resistance to aldehydes, ketones, and vegetable oils, and limited resistance to aliphatic and aromatic hydrocarbons, mineral oils, and oxidizing agents. They are not recommended for use with halogenated hydrocarbons. Marketlab bulk non-sterile pipettes come in a compact dispenser box with a hinged front panel for quick access that keeps the pipettes clean when the box is closed.