Ergo Armrests | Armrest Ergo 310 | Ergo Arm rests 310 Ergo Arm rests were made for maximum comfort This arm rest is suitable for use on the many popular series of seats. Also available are joy stick adapters with a maximum weight of 3.0 Kgs. Technical Specifications: Weight without seat adapter: 1.3kg Max. weight for a joystick: 1.0kg