Zero backlash. Two-piece metallic spring coupling. For little torque shaft connect. Color: Silver Tone; Material: Aluminum Alloy; Connection Diameter: 5mm to 11mm; Screw Angle: 90 degree;Total Length: 30mm /1.18 inch;Outside Diameter: 25mm /0.98 inch Absorption of parallel, angular misalignments and shaft end-play by spring action. Widely used in drive systems for encoders, instrumentation,lead screws, small pumps, feed rollers and anywhere light to medium duty, torsionally flexible coupling is required. Package Content: 1 x Shaft coupling