The 3M 91-AH is a heat-shrink connection kit for crimp connectors designed for low voltages. It is suitable for 4 or 5-core, unshielded, and non-armored insulated low-voltage plastic cables with ratings up to 0.6/1 kV. The shrink ratio is up to 4.5:1, the minimum shrink temperature is 135 °C, and the operating temperature range is from -55 °C to 130 °C. The 91-AH 20-5N is RoHS compliant, halogen-free, and provides excellent waterproof moisture sealing as well as protection against mechanical impacts. It features outstanding electrical insulation and good resistance to UV radiation, alkaline earth metals, and chemicals. Applications include electrical insulation and mechanical protection of crimp connectors. The 91-AH is suitable for use indoors and outdoors in underground and underwater installations. The 91-AH is available in black and in sizes designed for cable cross-sections ranging from 5 x 1.5 to 5 x 6 mm². Standard packaging is as a kit. Approvals: Type tested according to DIN EN 50393, Table 3.