Black Rubber Stopper #1 Solid . Top diam. is .748"(19mm). Bottom diam. is .551"(14mm). Height is .984"(25mm).

Approximately 61+ per pound.

Forensics Lab Supply Number 3740104.

Formerly Grau-Hall Corporation dba Grau-Hall Scientific.



NOTE: Unlike some inexpensive imported products, these stoppers are made to standard size and hardness specifications.