Duplo Medium Stone Gray Siren with Transparent Dark Blue Lights (2318 / 87072)

Duplo Medium Stone Gray Siren with Transparent Dark Blue Lights has been used in at least 21 LEGO sets over the past 18 years, since it was first used in 2006. 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.