Royal Wulff Sea Wulff Triangle Taper Intermediate Fly Line Coldwater 75°F & Below Size:10I Another nice feature of Ambush Cortland s Clear Intermediate Another nice feature of Ambush lines is the integrated shooting line to head (no loops to hang up when casting short or when landing a fish ) and the cool two tone color A 7wt switch rod would load well with the 10wt Ambush Line Weight Taper Handling Section Running Line Grains @ 30ft 7 30ft 10ft 65ft 225 8 30ft 10ft 65ft 245 9 30ft 10ft 65ft 285 10 30ft 10ft 65ft 310 11 30ft 10ft 65ft 415 12 30ft 10ft 65ft 465 105’ Total Length – Full length line for better line management and longer casts when needed