Huco 516H25.2424.Z Size 25 Oldham Coupling, Aluminum, Inch, 0.25" Bore A, 0.25" Bore B, 0.98" OD, 1.28" Length For use in parallel misalignment scenarios requiring zero backlash Aluminum alloy hubs for corrosion resistance and use in lightweight applications Flexible plastic torque disc for durability and low friction Torque disc slides between the two axes of the hubs to accommodate misalignment Operating temperatures range from -4 to 140 degrees F (-20 to 60 degrees C)