Side by side.

Specification	SD-347-T SD-347-T Quote
Width	0.535"
Height	0.570"
Material	Rubber
Type	Sponge
Durometer	2A5 (sponge grade)
Colour	Black
Mount	Tape
Tape	3M Heat-Activated Tape
Industries	Emergency Vehicles

Spec sheets live on each part's page.