Gardner Bender 3/8 In. Black Vinyl Wire Insulation or Cording Grommet, 5-Pack a convenient solution for protecting wire insulation or cords. These grommets are designed to snap into holes in various surfaces, such as steel boxes, sheet metal, and auto firewalls. The flexible black vinyl construction ensures a secure fit and protects sharp steel edges that could potentially damage wire insulation or cords. This grommet pack is a practical choice for keeping your wiring and cords safe from potential abrasions and wear. Model Number: GHG-1538