Is it a Complete Kit? Complete KitSF/SFC selection SFC clutch couplingSF unit size (250, 825 etc) 500SF/SFC FIELD MOUNTING Bearing MountTorque arm option No Torque ArmFHP Armature Type StandardOptional Release Spring No Release springIHP Armature Type Normal DutyVoltage (6, 24, 90) 24 volt dcRotor Bore Size (ex:3/4,1-1/4) 3/4 (0.75) inchArmature Bore (fraction: 5/16) 3/4 (0.75) inchFriction Material Standard