Made of borosilicate 3.3 glass tubing, the PorLab serological tubes with screw caps feature high structure stability and considerable mechanical strength, ideally stand up with possible thermal shock and resistant to chemical attack. Processed strictly following international standard on our unique production line, these tubes feature uniform dimensions, consistent bottoms, fine-polished mouth and standard screws. Various customized dimensions/sizes are also available upon demand

· Borosilicate 3.3 glass material, autoclavable

· Uniform dimensions and thickness