From the Accuflex website...
AccuFLEX Irons feature a smooth, stepless steeldesign that offers low vibration with great stability. They provide improved accuracy, consistency with a great feel, and are a desirable shaft among many top club builders.
These stepless steel shafts are a BIG time performer, for a "Regular Guy" price.
Length (in) 41"
Weight (g) 125g
Tip Diameter (in) 0.370
Butt Diameter (in) 0.605
Bend Point Mid
Swing Speed (mph) (A) 60-80, (R) 80-90, (S) 90-100, (X) 100+