3/4" x 1-9/32" x 5/16" x 1/16" Black Rubber Grommets

Diameter: 3/4"
Diameter 2: 1-9/32"
Thickness: 5/16"
Material: Rubber
Finish: Black
Type: Grommet
Groove: 1/16"
GrooveDiameter: 1-1/16"
Groove: x 1-1/16"

Box of 8.

Grommets and eyelets are metal, plastic, or rubber rings that are inserted into a hole made through another material. They may be used to reinforce the hole, to shield something from the sharp edges of the hole, or both.