Contains the optimum concentration of stain to give accurate results when used on the Hemtrak™ WBC Differential System and for manual staining Plastic container is easy to store and allows convenient dispensing into slide stainer traps Wright stain buffer is helpful with the development of the correct, clear nuclear color schemes and has a pH of 7.15 (10 × 4.4g vial; each vial prepares 1 gallon of pH 7.15 buffer) Directions for use printed on Wright stain container