&lt;p&gt;Task chair with upholstered seat in polyurethane foam. The backrest is made of polyester mesh, breathable. The chair is equipped with height-adjustable lumbar support. &lt;br&gt;&lt;br&gt;The &lt;strong&gt;armrests&lt;/strong&gt;, optional, are height adjustable and available in black nylon (Fritz) or aluminum (Classic).&lt;br&gt;&lt;br&gt;The backrest is available in various colours. The &lt;strong&gt;upholstered seat&lt;/strong&gt; is available in the following finishes:&lt;/p&gt;  &lt;ul&gt;  &lt;li&gt;imitation leather, fire retardant;&lt;/li&gt;  &lt;li&gt;MD fabric: 100% polypropylene, fire retardant;&lt;/li&gt;  &lt;li&gt;NV fabric: 100% polypropylene, fire retardant;&lt;/li&gt;  &lt;li&gt;NE fabric: 100% polyester Trevira, fire retardant.&lt;/li&gt;  &lt;/ul&gt;  &lt;p&gt;The operating chair is adjustable in height by &lt;strong&gt;gas lift&lt;/strong&gt;, equipped with a backrest and seat &lt;strong&gt;synchronized tilting mechanism&lt;/strong&gt; with 5 block positions, with the oscillation intensity regulator.&lt;br&gt;&lt;br&gt;The &lt;strong&gt;5 spokes base &lt;/strong&gt;is available in black nylon, chromed metal or aluminum. There are black brake castors or rubber castors, more suitable for delicate floors.&lt;br&gt;&lt;br&gt;The chair is delivered partially dismantled; for a surcharge you can order a fully assembled chair. Contact Customer Service for more information.&lt;/p&gt;                                                    &lt;p&gt;&lt;/p&gt;&lt;div class=&quot;sizes-and-weight-desc&quot;&gt;&lt;b&gt;Dimensions and weight&lt;/b&gt;&lt;table class=&quot;tDim cUfficio01&quot;&gt;&lt;tbody&gt;&lt;tr&gt;&lt;td class=&quot;tDim1&quot;&gt;&lt;span&gt;68 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim2&quot;&gt;&lt;span&gt;68 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim3&quot;&gt;&lt;span&gt;46-57 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim4&quot;&gt;&lt;span&gt;102-113 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim7&quot;&gt;&lt;span itemprop=&quot;weight&quot; itemscope=&quot;&quot; itemtype=&quot;http://schema.org/QuantitativeValue&quot;&gt;&lt;span itemprop=&quot;value&quot;&gt;16&lt;/span&gt; &lt;span itemprop=&quot;unitCode&quot;&gt;kg&lt;/span&gt;&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;&lt;/div&gt;