The white inscription circles are fixed permanently to the cap while marking can be made by using a standard ball-point or pencil. The corresponding screw cap cannot be over-tightened but gives a gas-tight closure.

The excellent rotational trueness of the tip of the conical centrifuge tubes resists the high stress that is applied to the tip during a centrifuge operation. The volume scale of the conical centrifuge tubes starts at 0.1 ml or 0.5 ml.

The high-grade PP material as well as the PE bags fulfil the medical directives (93/42) / USP 6. The tubes are produced on fully automated production lines, free of any human contact. TPP are the leading supplier of high grade tubes for tissue culture; we offer the best possible material, standard design and a guaranteed endotoxin level of < 0.06 EU / ml.