Martin ML095SS 3/4 Universal Series Jaw Coupling, Stainless Steel, Inch, 0.75" Bore A, 0.75" Bore B, 2.125" OD, 1" Length, 567 in-lbs Nominal Torque For use with Martin spider(sold separately) Stainless steel for strength, durability, and corrosion resistance Resistant to moisture, oil, grease, and contaminants such as dirt and sand Flexes up to 1 degree to compensate for angular misalignment of coupled shafts Operating temperatures range from -45 to 210 degrees F (-42 to 99 degrees C)