Seals-It grommets make it easy to run wiring through your firewall without risking wearing the wiring, and help keep dirt and grime out of your interior. This one is a split 1.00 inch inner diameter design that can slip over our finished drop-on wiring harnesses.
Details:

Split 1.00 inch inner diameter design
Can slip over our finished drop-on wiring harnesses
Keep dirt and grime out of your interior