Side by side.

Specification	SD-170-W SD-170-W Quote
Width	1.000"
Height	1.850"
Flange	0.125"
Material	Rubber
Type	Sponge
Durometer	2A4 (sponge grade)
Colour	White
Mount	Push On
Bulb position	Top
Core	SD-487 Spring Steel

Spec sheets live on each part's page.