Hub Kit #621Hub System Technology for Big engines with Big prop shafts.For Mercury Applications with 1.25” Prop Shafts. 150-400+hp with 4.75-5.44” Gearcases running Stainless Steel Props.A solution for stainless steel props but works great with aluminum props too. *For specific applications/usage see Turning Point Prop Wizard.Features:Extreme duty design and fit.Can last a lifetime with low-cost replaceable cushioned material inserts.A more cost-effective solution vs OEM options currently in the market.Easy to install by hand, no hub press machine needed.1-year material and workmanship warranty*Sold as an IndividualWARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to >P65Warnings.ca.gov.