Silicone-filled wire connectors for outdoor and electrical use. Current certification UL 486D as a sealed wire connector system. Ideal for applications where wires are exposed to condensation, water vapor or dust. Simple one-step installation requires no pre-twisting. Rated for temperatures as high as 221 degree Fahrenheit and wires ranging from No.22 to No.8. Waterproof and corrosion proof. Not to be used in applications where connectors will be continuously submerged.