Side by side.

Specification	BL-026 BL-026 Quote
Width	2.630"
Height	1.860"
Flange	0.125"
Material	Rubber
Type	Sponge
Durometer	2A2 (sponge grade)
Colour	Black
Mount	Push On
Bulb position	Top
Core	SD-487 Spring Steel

Spec sheets live on each part's page.