The quality stainless steel springs of the Rolyan Graded Springs are designed for a consistent and controlled force of traction dynamic splinting. Forces applied by the springs are identified every 1/4" (6.4mm) increment that the springs are stretched. 

(Package of 5) 

Size = Grams (1oz. = 28.35 grams) 

A=(20-50 grams) AA=(25-85 grams)

B=(30-100 grams) BB=(30-140 grams)

C=(65-195 grams) CC=(70-245 grams)

D=(145-405 grams) DD=(115-370 grams)

E=( 180-610 grams) EE=(145-490 grams)

F=(250-795 grams) FF=(200-620 grams)

G=(315-1020 grams)

H=(350-1245 grams)