Description General description These sterile disposable shorty Pyrex serological pipettes are calibrated "to deliver" (TD) with blow-out. They are ideal for use in confined areas such as hoods. The 5, 10 and 25 mL sizes have tooled tops and the 50 mL has a polypropylene top end. Negative graduations on each pipet make it applicable for both serological and measuring procedures. Legal Information Corning is a registered trademark of Corning, Inc. PYREX is a registered trademark of Corning, Inc.