Excellent for use in blood banks, hematology, chemistry, bacteriology and all general laboratory applications. They feature straight-cut tips and smooth, fire-polished tops to facilitate bulb attachment. Manufactured from heavy wall 7 mm glass and are manufactured using strict quality control to assure uniformity of delivery. In order to approximate the drop size delivered by blood bank reagent vial droppers, Chase uniform droppers dispense 25 ±3 drops per 1 ml. of serum or red cells at 23°C when held at a 45° angle