These sterile disposable shorty 50 mL PYREX® serological pipets are calibrated (TD) with blow-out. They are ideal for use in confined areas such as hoods. These pipets feature negative and reverse graduations to make it applicable for both serological and measuring procedures. Packaged in plastic bags so several can be removed without contaminating the entire pack. I.S.O. color-coding is printed directly on the tear strip.