Serum Tubes, 4mL, 13 x 75mm, Plain, Red Hemogard Closure, Loose (369032)

Serum tubes designed to obtain serum for laboratory testing. With no anticoagulant added, blood collected in these tubes is allowed to clot naturally before centrifugation to produce a clear serum sample. The red Hemogard closure provides secure, leak-resistant sealing and safe handling.