Gel and Clot Activator tube: CE, ISO13485. Spec.: 13*75mm, 13*100mm, 16*100mm. OEM ... serum.Various specification to meet your applications: MaterialPET/GLASSCap colorYellowAdditiveGel & Clot ActivatorSpecimenSerumSpecification13*75mm,13*100mm,16*100mmDraw volume3-8mlMax. vacuum degree ... tolerance±10%Invert the tube for 6-8 times gently and centrifuge for 5-10 ...