Side by side.

Specification	SD-120-AA-T SD-120-AA-T Quote
Width	0.625"
Height	1.156"
Flange	0.185"
Material	PVC
Second material	Rubber
Type	Sponge
Durometer	80 Shore A
Colour	Black
Mount	Push On
Bulb position	Top
Core	1in Stamped Steel

Spec sheets live on each part's page.