Knee Support Standard X Large 15.5 16.25 Interferential Stimulators 110 x 35 x 2 MSHQ 22030C 110 x 35 x 2 Complete Set Features: Bayonet locking mounts for each instrument head to allow secure connection to the battery handle * C cell powered satin finish chrome plated battery handle with knurled finish * Rheostatic on off switch * Complete in zippered case with fitted foam insert that is scuff and scratch resistant and cleans easily * Weighs 23 1 2 oz * Inspected and packaged in the U X Large * Fits knee circum 25 (measurement taken just under the knee cap while knee is slightly bent) * Thermal support for prevention treatment & rehabilitation of the knee * Provides protection and support against general wear and tear including sprains strains and twisted knees * Anatomically shaped in 3 pieces for more comfort and a better fit * Thermoskin increases elasticity of muscles tendons and ligaments to reduce the risk of injury when under stress and strain * Clinically proven to increase surface skin and subcutaneous temperature between 2 3 degrees F the optimal level to make tendons and muscles more pliable and elastic to provide optimal muscle function