The Ensto SBO2.1 is a heat-shrink cable joint kit for two-core low-voltage cables rated 1 kV, covering conductor cross-sections from 6 mm² to 35 mm². The main shaft shrinks from a 33 mm outside diameter down to 10 mm, while individual finger sleeves reduce from 14 mm to 3 mm, giving a total assembly length of 90 mm once cured. Operating temperature range is -20 °C to 80 °C, manufactured in Switzerland.