The following are sterile Vacumed® capsules with no additives and white caps. Models 42910, 42911, and 42912 each measure 13x75 mm. They hold 2, 3, and 4 ml of blood respectively. Holding 6 ml of blood is model no. 43916 which measures 13x100 mm. Model 44919 contains 9 ml of blood and measures 16x100 mm.