Pipette filler bulbs are designed for use on all Globe Scientific capillary tubes
Capillary tube sealant contains a unique wax compound that quickly forms a leak-tight seal. Non-toxic, non-drying, and non-hardening, the sealant is formulated to withstand centrifugation. There is no need for plastic caps or heat sealing.
They help expel the blood from the capillary tube (if needed). They are also used when drawing blood directly from a 13mm or 16mm blood collectioon tube (instead of directly from a finger).