McKesson Capillary Blood Collection Tube Micro-hematocrit Sodium Heparin Additive 1.1 X 75 mm 75 µL Red Stripe Without Closure Glass Tube 75 µL clear, glass capillary blood collection tube with no closure 1.15 x 75 millimeters Red stripe Treated with an anticoagulant, sodium heparin, for use when collecting sample by finger stick from a patient or when using untreated blood Color-code red stripe to differentiate untreated tubes from heparinized tubes Designed for both safe blood collection as well as accurate micro-hematocrit determinations Precision-molded soda lime glass provides excellent sample retention during centrifugation Fill rapidly without affecting specimen integrity RCF rating: 14,500 RPM