These sterile disposable shorty 25 mL PYREX® serological pipets are calibrated (TD) with blow-out and have tooled tops. They are ideal for use in confined areas such as hoods. Negative graduations on each pipet make it applicable for both serological and measuring procedures. I.S.O. color coding is printed directly on the Steri-View™ (one side paper, one side plastic) wrapper.