Side by side.

Specification	ED-5390 ED-5390 Quote
Width	2.750"
Height	0.750"
Flange	0.250"
Material	Rubber
Type	Sponge
Durometer	2A5 (sponge grade)
Colour	Black
Mount	Push On
Core	SD-500L Spring Steel
Industries	Emergency Vehicles

Spec sheets live on each part's page.