Side by side.

Specification	SD-12122-160-Opening SD-12122 .160 Opening Quote
Width	0.600"
Height	1.400"
Flange	0.250"
Material	Rubber
Type	Sponge
Durometer	2A2 (sponge grade)
Colour	Black
Mount	Push On
Bulb position	Top
Core	1.43in Wire
Industries	Agriculture Equipment

Spec sheets live on each part's page.