The Shimano Spirex SR1000FG, Spirex 2500FG and Spirex 4000FG have Quick Fire II casting for easy one handed casts and 5 Shielded Stainless Steel Ball Bearings for smooth retrieves with Varispeed Oscillation.  The Spirex SR1000FG and Spirex SR2500FG are 6.2 ratio and the Spirex SR4000FG is 5.7 ratio.

More features of the Shimano Spirex.

Propulsion Line Management System: Propulsion Spool Lip, Power Roller III, S-Arm Cam

Lightweight Graphite Frame, Sideplate & Rotor

Cold Forged Aluminum Spool

S-Concept: S-Guard, S-Arm Cam

Ported Handle Shank

Rubber Handle Grips

Fluidrive II

Dyna-Balance

Repairable Clicker

Approved for use in Saltwater

Rated for use with Mono, Fluorocarbon and PowerPro lines

Model	Line Retrieve Per Crank	Line Capacity
SR1000FG	28	2/270, 4/140, 6/110
SR2500FG	32	6/200, 8/140, 10/120
SR4000FG	33	8/240, 10/200, 12/160