Waterworks Lamson Guru Extra Spools - GURU 4 Fly Line Weight: [1.5] 4 WF, [2] 6 WF, [3] 7 WF, [3.5] 9 WF, [4] 10 WF Material: aluminum, stainless steel, [finish] clear type 2 anodized Backing Capacity: [1.5] 100 yards 20 lb, [2] 100 yards 20 lb, [3] 150 yards 20 lb, [3.5] 200 yards 20 lb, [4] 250 yards 30 lb Recommended Use: fly fishing Manufacturer Warranty: lifetime