The 521 seat uses 4 coil springs to carry a far greater load (80-150kg)

Mainly for use with heavy operators or extra items bolted to seat upper.

Note: Seat will not operate for an operator under 80kg

• 100mm mechanical suspension stroke
• 60mm seat height and tilt
• 80-120kg weight adjustment
• Full seat back recline
• 200mm slide rail adjustment
• Provision for second damper
• 5 position lumbar adjustment