3/4" x 1-9/32" x 5/16" x 1/16" Black Rubber Grommets 8PK, Midwest Fastener, Mfr#: 64374

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.