[Application]:Use for MERCURY / MARINER 135 - 250 VERADO 200 - 300 120 - 375 ALPHA AND ONE STERNDRIVES ALSO / MAR 75 1984 AND NEWER VERADO 135 - 200 Fury, Plus, Plus, REV 4, , I and Propellers.(Attention:Not work for Verado V8 engines with 1.25 inch prop shafts.) [Function]:Used to protect the transmission system maintenance and parts replacement. Buffering and protecting the transmission system from shocks. [Advantages]:Soft-Shift rubber hub kit Helps prevent shifting noise and propeller rattle to deliver quieter, smoother, delivery of your engine's power to the propeller. Color: black Material: metal Package Contents: 1x - II Hub Kit Only the above package content, other products are not included. Note: Light reflection 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.