Five Oceans Marine Stainless Steel Hinged Self-launching Bow Anchor Roller 13" x3 3/4" FO-3696 Length: 13" (328mm) Material: Stainless Steel Dimension: 13"x3 3/4" 328x96mm (Height 70mm) Hinged Bow Roller with Nylon Wheel Bow Roller for Delta Anchor