Laboratory PU Ergonomic Saddle Stool The laboratory ergonomic saddle stool is made with hard wearing chemical resistant polyurethane and promotes positive posture. The curved seat pad design provides a similar ergonomic seated position to the general saddle stool. Both the standard and the coccyx stools have similar designs to the deluxe saddle chairs, designed to encourage positive posture throughout seated procedures. Specifications Maximum safe working load of 150 kg Standard height range is 45cm-59cm High height range is 54cm-74cm Features 2 lever mechanism for height and tilt adjustments Polished aluminium five star base and castorsChemical resistant5 year warranty ..