3M Cold Shrink Connector Insulators 8440 Series are open-ended, factory-expanded silicone rubber tubes designed with cold shrink technology and loaded on a removable plastic core. To install the connection, position it over the inline connector, pull the loose tab on the plastic core while unwinding the core in a counterclockwise direction, allowing the ends of the tube to shrink and form a secure seal. Engineered for primary insulation of solid dielectric insulated wires and cable splices rated up to 1000 volts, the insulators can be used for indoor and outdoor applications to provide a moisture-resistant seal. They are easy to install by hand, requiring no additional tools or heating sources. Accommodating an application range of 0.35 in (8.86 mm) to 0.95 in (24.13 mm) for installations on 6 AWG to 3/0 AWG, 3M Cold Shrink Connector Insulators 8440 Series provide physical protection and environmental sealing for terminal lug barrels and inline connectors. These insulators are ideal for electrical aircraft cables, cable trays or overhead applications, sheath repairs, and secondary splices for both copper and aluminum conductors. They can withstand an operating temperature range between -66 °F to 500 °F (-55 °C to 260 °C). With reliable thermal stability, high chemical resistance, fire resistance, and a secure moisture seal, 3M Cold Shrink Connector Insulators 8440 Series is your answer to dependable insulating performance.3M has over 40 years of lab-tested and industry-proven results with the reliability of cold shrink technology. 3M Cold Shrink Connector Insulators 8440 Series and the other products in the cold shrink family are engineered with specifically formulated materials that deliver a durable environmental seal and insulation. The cold shrink product portfolio is a complete line of components and accessories that deliver solutions to customers worldwide. In this advanced solution, the formulation of silicone rubber provides increased reliability to the impact of UV, fluid splashes, acids, and alkalis, as well as offering excellent hydrophobic properties. Additionally, silicone construction offers high flexibility at low ambient temperatures and excellent mechanical and dielectric behavior.