&lt;p&gt;Executive office chair with high backrest and chromed steel armrests.&lt;/p&gt;  &lt;p&gt;The pyramidal base ∅640 mm is made of chromed steel. The standard castors are made of rubber, suited for delicate floor.&lt;/p&gt;  &lt;p&gt;The steel frame is available covered with quilted polyurethane (imitation leather) or net.&lt;/p&gt;  &lt;p&gt;The seat's height is adjustable by gas lift. For the regulation of seat and back you can choose from two mechanisms:&lt;/p&gt;  &lt;ul&gt;  &lt;li&gt;O1 - &lt;strong&gt;tilting monoblock&lt;/strong&gt;: provides free tilting and allows locking just in upright position;&lt;/li&gt;  &lt;li&gt;OM - &lt;strong&gt;tilting multiblock&lt;/strong&gt;: provides free tilting and allows locking in 5 different positions.&lt;/li&gt;  &lt;/ul&gt;  &lt;p&gt;The multiblock mechanism is equipped with &lt;strong&gt;anti-shock system&lt;/strong&gt;, that prevents the abrupt return of the backrest in a vertical position, and &lt;strong&gt;strength adjuster&lt;/strong&gt;, which allows to adjust the resistance to oscillation.&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;45 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim2&quot;&gt;&lt;span&gt;48 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim3&quot;&gt;&lt;span&gt;41-51.5 cm&lt;/span&gt;&lt;/td&gt;&lt;td class=&quot;tDim4&quot;&gt;&lt;span&gt;105-116 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;13.9&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;