30 mL centrifuge tubes are ideal for general purpose laboratory work.  These tubes are especially useful as a 95kPa certified leak-proof primary container in shipping infectious specimens. The 30 mL tube with spork is also widely used in parasitology specimen transport.  …

30 & 50 mL centrifuge tube racks that hold up to twenty tubes in alpha-numerically labeled holes.  Freestanding centrifuge tubes lock into place for one-handed processing.  Available for 30 & 50 mL centrifuge tubes and 15 mL centrifuge tubes.