Walmart has the Yard Master Outdoor Patio Extension Cord – 40 ft. in $8.58 with free shipping.
Product Features:
- Ideal for use with outdoor appliances, decorative lighting, and holiday displays.
- Jacket resists moisture, chemicals, oil, abrasion and prolonged exposure to sunlight.
- 3-pronged outlets.
- 13A rating at 125V, 16/3-gauge.