Side by side.

Specification	DU-004 DU-004 Quote
Width	1.524"
Height	0.600"
Flange	0.125"
Material	Rubber
Type	Sponge
Durometer	2A2 (sponge grade)
Colour	Black
Mount	Push On
Core	SD-487 Spring Steel

Spec sheets live on each part's page.