... 1,polypropylene (PP) 2,printed graduations 3,with silicon ring freeze pipe1, material: PP;2, printed/molded graduations or no ... graduations available;3,all of them are with silicon "O" ring ... ring,ungraduated4ml200pcs/bag,22bags/cartonSHB06Freeze tube,silicon ring,printed graduated5ml200pcs/bag,20bags/cartonSHB07Freeze tube,silicon ring,ungraduated7ml150pcs ...