Wiretrol 5-000-2005 Positive Displacement Microdispensers, 1-5 uL; 250/pk

Draw fluid into the calibrated glass barrel with fingertip plunger. Accuracy is ±1% of contained volume. Each pack contains 250 disposable glass barrels and two plungers: use long plunger to clear barrel; use short plunger to maintain air cushion between plunger and sample.