7 Bearing System - Corrosion resistant stainless steel ball bearings. Graphite Body and Rotor - Lightweight graphite reel construction. Aluminum Spool - Lightweight, durable, spool design. Stainless Steel/Oil Felt Drag - Consistent drag pressure, and corrosion resistant. Aluminum Handle - Aircraft grade aluminum, extreme durability. Soft Touch Knob - Soft touch rubber knob provides excellent grip and comfort. 20 size reel is a 5 BB System.