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. 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.