(16/Pack) PTS Collect 15 uL capillary tubes provide speed, efficiency and savings especially for applications where exact sample volumes are required. PTS Collect capillary tubes provide better efficiency and are designed to be easier to use than traditional blood transfer tubes. Using a single glass tube with plastic casing, PTS Collect capillary tubes provide consistent self-wicking technology to preset volumes. This improved design is perfect for blood collection needs covering a wide range of applications across many different medical devices.