The Solo 111 Extension Pole is to be used to extend the height of the Solo 110 telescopic access pole. The maximum working height using Solo 110 & Solo 111 poles is 4.5 metres for Solo and Testifire. This is achieved using 1 x Solo 110 telescopic pole and a maximum of 3 x Solo 111 extension poles. It is recommended to stand directly under the detector. No more than 3 x Solo 111 extension poles should be used at the same time.