Duplo Medium Stone Gray Siren with Transparent Orange Lights (15613 / 87072)

Duplo Medium Stone Gray Siren with Transparent Orange Lights has been used in at least 11 LEGO sets over the past 15 years, since it was first used in 2009. You can also find this part in at least 3 other colors. It has the design IDs 2318, 15613, 33746, 37089, 87072 which can usually be found molded into the bottom of the part.