NEMA L6-20 Locking Extension Cord 20Amp 250Volt 3-Prong Locking Power Cord SOOW 12/3 30Amp Copper with 600Volt Rubber Jacket 20A 250V-Max Operation Power:5000W 20Amp Anti-Weather, Oils, Acids and Chemicals Rubber Locking Extension Cord This is 25Ft NEMA L6-20 20Amp 250Volt 3-Prong Locking Extension Cord. The Cable is SOOW 12/3 20Amp Copper with 600Volt Rubber Jacket which stays flexible in cold weather. This cord is popular using in Generator, industrial, construction.