The Ensto SBO3.1 is a heat-shrink cable joint kit for three-core low-voltage cables rated 1 kV, spanning conductor cross-sections from 6 mm² to 50 mm². The main shaft shrinks from a 38 mm outside diameter down to 14 mm, while individual finger sleeves reduce from 14 mm to 4 mm, giving a total assembly length of 110 mm once cured. Operating temperature range is -20 °C to 80 °C, manufactured in Switzerland.