Self-Aligning Rod Coupler Fk-5/8-18 Compensates For Angular And Radial Misalignment, For Fitting On Piston Rod Side. Size=5/8, Corrosion Resistance Classification Crc=2 – Moderate Corrosion Stress, Ambient Temperature=-40 – 150 °C, Product Weight=650 G, Materials Note=(* Free Of Copper And Ptfe, * Conforms To Rohs)