Complete kit to upgrade your Side-Power 75T or 95T thruster from a 4-blade prop to the newer, quieter and more efficient 5 blades Q-Prop. Can be adapted to all 75T and 95T models produced after 1998. Noise reductions of up to 75% measured in controlled environments The expected and tested normal noise reduction in average installations 20-40% Will be delivered on all Side-Power models during 2008 except the SP550 Upgrade kits are available for most SP Series thrusters with special adaptors Actual noise reduction will vary with boat type and thruster installation Material: Composite Propulsion System: 5 blades Includes: (2) Q-Props, (2) Adapters, (2) Zinc Anodes with Bolts, (2) Propeller Drivepins, (2) Propeller Lock Nuts, (2) Propeller Washers