Use this heavy duty bulk light stringer to decorate your patio, gazebo, or outdoor venue this Christmas season. The 165 medium base black sockets are spaced 24 inches apart on 330 feet of SPT-2 heavy duty 16 AWG black wire. The bulk stringer has no end plugs and is intended for installation by a qualified electrician ONLY. The sockets have brass contacts and are enclosed in PVC for a weather resistant seal and they are resistant to UV sunlight making them long lasting. Use A15 or S14 incandescent light bulbs (not included) for a traditional warm look. Not compatible with 7.5W S11 bulbs.