Side by side.

Specification	ED-5386 ED-5386 Quote
Width	3.250"
Height	0.650"
Flange	0.125"
Material	Rubber
Type	Sponge
Durometer	2A3 (sponge grade)
Colour	Black
Mount	Push On
Core	SD-487 Spring Steel
Industries	Emergency Vehicles

Spec sheets live on each part's page.