These ramps, sold in pairs, are made from two nested aluminium extrusions. They produce a strong rigid ramp, which gives a feeling of stability and security to the user. They can be telescoped in and out to give the optimum length and the closed down to their minimum for storage or transporting. A spring safety lock holds the sections closed. Internal width 188mm (7.5 inches). External width 245mm (9.5 inches). Available in three lengths - please choose the corresponding length code from the above list when ordering: Length 1 - minimum length 880mm (34.5 inches) - maximum length 1500mm (59 inches) - weight 6.8kg. - maximum total load 450kg (70.75 stone). Length 2 - minimum length 1130mm (44.5 inches) - maximum length 2000mm (78.75 inches) - weight 8.7kg - maximum total load 400kg (62.75 stone). Length 3 - minimum length 1630mm (64.25 inches) - maximum length 3000mm (118 inches) - weight 12.6kg - maximum total load 350kg (55 stone).