Waterworks Lamson Vanquish Extra Spools - V10 LT Fly Line Weight: (4.5) 4 WF, (5.6) 6 WF, (7.8) 7 WF, (8) 8 WF, (10) 10 WF, (12) 12 WF Material: 6061 aluminum, stainless steel Backing Capacity: (4.5) 100 yards 20 lb, (5.6) 100 yards 20 lb, (7.8) 150 yards 20 lb, (8) 220 yards 20 lb, (10) 220 yards 30 lb, (12) 175 yards 30 lb Recommended Use: fly fishing Manufacturer Warranty: lifetime