... graduations or ungraduated with silicon ring ISO9001 1ml,2ml freezing tube1, material: PP;2, printed/molded graduations ... ring,ungraduated 1ml 500pcs/bag,24bags/cartonSHB02Freeze tube,silicon ring,ungraduated 1ml 500pcs/bag,24bags/cartonSHB03Freeze tube,silicon ... ,molded graduated 2ml 500pcs/bag,24bags/cartonSHB05Freeze tube,silicon ring,ungraduated 4ml 200pcs/bag,22bags/cartonSHB06Freeze tube,silicon ...