100Pcs Conical Centrifuge Tubes 15mL with Screw, Graduated and Write Marks Lab Test Container

LEAK-PROOF - 15mL centrifuge tubes have length screw , which is sample leakage and it , flat inner , no residual solution. EASY READ - 15mL centrifuge tubes sterile with easy-to-read black graduations. WRITING AREA - 15mL conical tubes With a unerasable frosting white writing area easy and legible , and both the graduations.