Star Trek: Deep Space Nine, Polaron Emitter

original movie prop

Polaron Emitters were used in the episode "Apocalypse Rising" in order for the DS9 crew, who were disguised as Klingons, to see if Gowron was a shapeshifter.  The screencaps show one emitter and four emitters displayed on a table on DS9.  This prop was also used as a Jem'Hadar bomb in Garak's basement in the episode "What You Leave Behind".  The last screencap shows the prop rolling down the basement stairs after the Jem'Hadar threw poor Mila down the stairs.