Side by side.

Specification	SD-650-T SD-650-T Quote
Width	2.150"
Height	0.884"
Material	Rubber
Type	Sponge
Durometer	2A3 (sponge grade)
Colour	Black
Mount	Tape
Tape	3M Heat-Activated Tape
Industries	Recreational Vehicles

Spec sheets live on each part's page.