Easily and precisely transfer solutions from one receptacle to another with PROgeneŽ Serological pipettes. Bi-directional graduations provide choice of ascending and descending scales. Printed indicator arrow for quickly locating negative graduations when using a pipette controller. Paper/Plastic wrap with color-coding on paper allows for easy size identification features a premium material barrier plug. Made of polystyrene plastic. Sterile, individually wrapped. Certified non-pyrogenic and DNase-/RNase-Free. Manufactured to the ASTM Standard Specification for Serological Pipets E-934.