HellermannTyton's 302-30320 heat shrink sleeve is a black shrink-fit plastic tubing with a pre-expanded nominal diameter of 3.2mm and a diameter of 1.6mm after shrinking. This product is resistant to most common fluids and has a wide range of applications, from industrial to electronics. It is resistant to water, oils, acids, salts, surfactants, and further good chemical resistance. It is ideal for providing insulation and strain relief to cables, connectors, and splices.