HomeSuper Heavy Duty Slides -- Above 600 lbs. 5 Products AL4140 – Full extension, lightweight aluminum, corrosion resistant, loads up to 1,323 lbs. (600 kg) per pair. AL4120 – ¾ extension, lightweight aluminum, corrosion resistant, loads up to 1,212 lbs. (550 kg) per pair. AL4160 - Alumnium, 661 lbs AL4165 - Aluminum, 596 lbs Aluminum Two-Way travel slide, full-extension, loads up to 596 lbs. (270 kg)per pair. C4170 Super Heavy-Duty Slide with 100% Travel This super heavy-duty slide delivers smooth, full-extension movement for loads up to 2,150 pounds.