Sure-Flex Plus Coupling Size 6 Maximum Speed 6 000 RPM Maximum Torque 1 800 in-lb Outside Diameter 3 3/4 in Insert Construction - New 2-Piece Angular Misalignment 0.25 Degrees Horsepower @ 100 RPM 2.9 hp Insert Material Hytrel Insert Width 1 7/8 in Parallel Misalignment 0.01 in System of Measurement Inch Torsional Stiffness 10 000 in-lb/rad Application Compressors Conveyors Electric Motors Fans/Blowers Mixers Pumps Maximum Operating Temperature 250 Degrees F