... easy open , easy close Material:PP molded graduated 1)1.5ml micro centrifuge tube2)Material:PP3)molded graduated4)conical bottom5) ... with rocking capThe following is the brife introduction of our factory:1.Customize micro ... workshop,dust-free injection and assembly workshop.4.Various plastic material :PP,PE,PVC,PS,PPS,POM,ABS ,PEEK, ...