Pico 6119PT Vinyl Wire Grommets ID 3/8" x OD 1/2" 40 per Package 3/8" Inside Grommet Diameter (OD of Wire or Wires to Pass Through) 1/16" Groove Width (Thickness of Wall Grommet Will Be Installed In) 1/2" Min Hole Size ( ID of Predrilled Hole for Grommet) Gaurds Against Cut or Frayed Wires 40 per Package