This set includes non-heparinized (blue) and sodium-heparinized (red) micro-hematocrit capillary tubes, each vial containing 100 precision glass tubes (75 ± 0.5 mm length, ID 1.1–1.2 mm, OD 1.5–1.6 mm, ISO 9001), together with a Cat.No.1103 counting chamber for manual cell counting.