The Ultimate Ergonomic All Rounder.
The Delta Range consists of three back heights and is available with standard 490W x 465D seat.
Include the option of a heavy duty mechanism and this raises the chairs weight rating to 135kg's.
Backs heights available: 
Medium 410W x 410H
High 450W x 500H
Extra high 490W x 590H
Features include:
3 lever fully ergonomic mechansim
Ratchet back height adjustment
Multiple configurations are AFRDI Level 6 certified to severe commercial use.
Standard seat using Australian made moulded foam.
User weight rated to 135kg's
15 year Australian manufacturers warranty
Options available:
Adjustable arms
Seat slide function
Drafting option
Extra large 2XL - (570W x 520D) 
Fabric Options:
Warwick Ashcroft
Delivered fully assembled
Usually leaves our warehouse within 10-15 days business days.