Pico 6120PT Vinyl Wire Grommets ID 1/2" x OD 5/8" 20 per Package 1/2" Inside Grommet Diameter (OD of Wire or Wires to Pass Through) 1/16" Groove Width (Thickness of Wall Grommet Will Be Installed In) 5/8" Min Hole Size ( ID of Predrilled Hole for Grommet) Gaurds Against Cut or Frayed Wires 20 per Package