The Ensto SBO5.1 is a heat-shrink cable joint kit for five-core low-voltage cables rated 1 kV, covering conductor cross-sections from 4 mm² to 50 mm². The main shaft shrinks from a 50 mm outside diameter down to 15 mm, while the individual finger sleeves reduce from 15 mm to 4 mm, giving a total assembly length of 105 mm once cured. The operating temperature range is -20 °C to 80 °C, and the kit is manufactured in Switzerland.