Side by side.

Specification	SD-706 SD-706 Quote
Width	1.050"
Height	0.850"
Flange	0.250"
Material	Rubber
Type	Sponge
Durometer	2A3 (sponge grade)
Colour	Black
Mount	Push On
Bulb position	Side
Core	SD-500L Spring Steel

Spec sheets live on each part's page.