OTC 0320, KidsLine Pediatric Supports: The OTC 320 KidsLine cradle arm sling provides well balanced support to the arm, evenly distributing its weight. KidsLine is OTC's family of Pediatric and Youth sized products. They are cut and assembled to follow the same anatomically correct profile as our popular adult versions, but are "right sized" to fit a smaller frame. Helps in the treatment of: For wear post-fracture, sprain or surgery