Our glass capillary tubes are designed for both safe blood collection as well as accurate micro-hematocrit determinations. Precision molded, they provide excellent sample retention during centrifugation. In addition, the tubes fill rapidly without affecting specimen integrity.
The tubes are available plain or with an anticoagulant (sodium or ammonium heparin) that keeps the blood from clotting. All of the tubes have color coded ends to easily identify the plain and heparin treated tubes.
Types of Tubes
Untreated: Blue Tip
Ammonium Heparinized: Green Tip
Sodium Heparinized: Red Tip
Packaging: 100 tubes per vial, 10 vials per box (1000 tubes per box)
ID: 1.15mm +/- 0.05mm
OD: 1.5mm +/- 0.05mm
Length: 75mm +/- 1mm
Spin rate: 14,500RPM for 5 minutes
If collecting anti-coagulated blood from a blood collection tube, use a plain capillary tube.
If collecting by finger stick from a patient or when using untreated blood, use capillary tubes that are treated with an anticoagulant (heparin).