for low water fishing with up to 65-80 grain versileaders. Need grain window 300-430 depending on length. I have a couple rods for which this line will pull double duty and cross over (Z-axis 6126, 5110). So 4/5, 5/6, 6/7. Rio AFS, Steelhead Scandi, Compact Scandi, Airflo Scandi Compact. Really like to find a CND 5/6 GPS in case you have one of these. Had it, sold it, wish I hadn't. Nice casting line.