Side by side.

Specification	SD-1400-NAV-1in SD-1400 w/ NAV 1in Quote
Width	1.300"
Height	1.110"
Flange	0.150"
Material	PVC
Second material	Rubber
Type	Sponge
Durometer	78 Shore A
Colour	Black
Texture	Leather Grain
Mount	Push On
Bulb position	Side
Core	1.4in Stamped Steel

Spec sheets live on each part's page.