Side by side.

Specification	DU-202 DU-202 Quote
Width	2.200"
Height	0.768"
Flange	0.250"
Material	Rubber
Type	Sponge
Durometer	2A5 (sponge grade)
Colour	Black
Mount	Push On
Bulb position	Side
Core	1.7in Wire

Spec sheets live on each part's page.