1. ADVANTAGE: Works for MotorGuide (GFEL-MG-R-DP). NOTE: Will not work with and Hydrilla Hacker Props.2. FUNCTION: Stabilizes the propeller by providing a larger contact point.3. advantageS: Lessens propeller noise and vibration.4. NICE DESIGN: Replaces prop nut and washer, provides smoother, quieter, flex-free operation, reduces wear-n-tear on trolling motor and batteries. In addition, it acts as a heat sink and has built-in cooling ports that reduce the operating temperature for longer battery and trolling motor life.Colour:BlackMaterial:metalPackage Contents:2x Eliminator Trolling Motor Prop NutOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.