Wire Nut (Yel) 14-10 gauge wire range.

• Wire Nuts can also be called twist nuts, twist wire connectors, or wire twist nuts. Whichever, their tight, square-wire spring makes quick, secure connections for positive continuity. 
• Tough, thermoplastic shell shields against environmental extremes. Resists chemical action from hydrocarbons, dilute acids, or alkaline solutions. 
• Flame-retardant properties resist heat distortion up to 221 degrees. High-dielectric shell features a deep skirt design to prevent exposure of bare wire. 
• For copper to copper connections only. 
• Twist Nuts make an excellent low cost means for making connections between two or more conductors.
• All Wire Nuts are listed.