757 CS is centrifugal braking with a level wind757 Ct is centrifugal braking with an open cage757 CSM is magnetic braking with a level wind757 CTM is magnetic braking with a open CT cage (no level wind)Line Capacity 20lb 320ydsDrag pressure 20lb+Line capacity 5.5:1Carbon Multi Disc Drag System for Optimal Drag PerformanceBrass Anti-Corrosion Chromed Side Plates2 + 1 Stainless Steel Bearings Machined Brass GearsSynchronised Level-Wind(CS/CSM)Stainless Steel Power HandleCorrosion Resistant InstantLine Out AlarmHigh Torque Winding PowerMag/Centrifugal Brake SystemOpen Top CTM frame (On CTM )Dual Anti Reverse FeatureAnti-Reverse Bearing These reels come with a free reel case worth 7.99