Pico 6116D Vinyl Wire Grommets ID 3/16" x OD 5/16" 18 per Package 3/16" Inside Grommet Diameter (OD of Wire or Wires to Pass Through) 1/16" Groove Width (Thickness of Wall Grommet Will Be Installed In) 5/16" Min Hole Size ( ID of Predrilled Hole for Grommet) Gaurds Against Cut or Frayed Wires 18 per Package