Narthex made out of aluminum, foamy material and multi-central joint with flexure range of 0 - 120 degrees and stretch of 0-30 degrees with a gradation of 10 and 15 degrees.

References: Twists and dislocation of elbow, Strains, Muscle and tendon injuries. Dislocated elbow, Post-surgery

S up to 40cm
L over than 40 cm