The one-piece slip-on joints are available for voltages from 72.5 kV to 300 kV. Due to the one-piece construction the joints are extremely compact in size. The space required in a joint bay therefore is reduced to a minimum. Each size of the silicone body covers a range of different insulation diameters. Up to 5 different outlets are available for efficiently sealing of fibre optic cable and/or PD sensor cables.