Length  Width Thickness Tension
Extra Light 11.8'' 1.9'' 0.35 mm 5-10 lb
Light 11.8'' 1.9'' 0.5 mm 10-15 lb
Medium 11.8'' 1.9'' 0.7 mm 15-20 lb
Heavy 11.8'' 1.9'' 0.9 mm 25-30 lb
Extra Heavy 11.8'' 1.9'' 1.1 mm 35-40 lb