Pico 6117pt Vinyl Grommet Id 1/4xod 3/8 1/4" Inside Grommet Diameter (OD of Wire or Wires to Pass Through) 1/16" Groove Width (Thickness of Wall Grommet Will Be Installed In) 3/8" Min Hole Size ( ID of Predrilled Hole for Grommet) Gaurds Against Cut or Frayed Wires 50 per Package