Side by side.

Specification	SD-331-T SD-331-T Quote
Width	0.685"
Height	0.750"
Material	Rubber
Type	Sponge
Durometer	2A4 (sponge grade)
Colour	Black
Mount	Tape
Bulb position	Top
Tape	3M Heat-Activated Tape
Industries	Construction Equipment

Spec sheets live on each part's page.