Model 4400-S: Small Arm (8″W x 30″L), 1⁄2 Adult arm, child up to 85 lbs.
Model 4400-M: Medium Arm (8″W x 30″L), Adult up to 150 lbs.
Model 4400-L: Large Arm (10″W x 30″L), Adult over 150 lbs.
Use for casts, bandages, dressings, surgical wounds, I.V. sites, PICC lines, orthopedic injuries.