Rainbird  Direct Bury Silicone Tube with Red and Yellow Twist-On Wire Nuts Includes red wire nut and direct bury silicon-filled tube - Ideal for use on two wire decoder control systems Use for standard controllers, valve boxes and soil moisture sensors. - Wire combinations ranging from 22ga to 8ga Use on connections from 24 VAC to 600 VAC. - UL 486D listed as a sealed wire connector system The Strain Relief ensures wires are secure and won't pull apart. - Waterproof silicone grease protects against corrosion UV- material ensures product performance does not degrade even after long periods of exposure to sunlight