Coleman Cable 233850408 SJEW Service Cord, Black, 18/3, 250-Foot. 250-foot spool of wire. SJEW Service Cord, Black, AWG size: 18/3. Flexible and tough Seoprene jacket. Water resistant with high dielectric insulation. Excellent abrasion, ozone, sunlight, chemical and oil resistance. Lightweight, long lasting, easy to carry and easy to handle. 18/3 SJEW BLK 250"R. The Coleman Cable (R) brand is a registered trademark of Coleman Cable Inc.