Stopper for evacuated blood collecting tube.

摘要

A stopper for an evacuated blood collecting tube having a head (1) provided with a recess (12) in the center of a head cavity (11) and a projection (13) formed on the center of the bottom of the recess. The diameter (6) of the projection (13) is smaller than the inner diameter (9) of the recess (12), and the center portion projects upward and the surrounding portion declines toward the periphery of the projection. <IMAGE>