DIAMOND 4 PROPELLER
4-Blade Aluminum (Replaces Mercury Alpha 4 Series) Black powder coat finishFor Stern Drives & Large Gear Case Outboards (4-3/4" gear case)Using the FLO-TORQ II Hub System, hubs must be ordered separately20" replaces 21" 3 blade18" replaces 19" 3 blade16" replaces 17" 3 blade