WNC1064 Features: Operating speed: 540 RPM Generator end connection: 1-3/8'' -6 spline Tractor end connection: 1-3/8'' -21 spline Specifications: Provides reliable electrical power for utility tractors with 12 to 40 horsepower PTO Compatible with 35-50 kW PTO generators from Winco Shaft power rating: 90-100 HP