but is gentle on the skin

Easy setup includes an aluminum heat exchange system and external slip-on heater (sold separately)

Use it in any size

It has performed extremely well in studies with 98

BD Vacutainer® Plus Serum Tube, 100mm, 13mm OD, 6mL Draw Volume Sold By:Box of 100 but is gentle on theVacutainer Plus plastic serum tubes have spray coated silica and are used for serum determinations in chemistry. Samples processed in these tubes may also be used for routine blood donor screening, immunohematology and diagnostic testing of serum for infectious disease. Made of plastic. Red Hemogard closure. Paper label. Additive: Clot activator. Silicone coated.