Jay J3 posterior lateral back is the most versatile wheelchair back for with different support height levels. The J3 wheelchair back product line offers a multitude of width, height, and contour depth back shells to fit the back to the client. J3 Posterior lateral has 3" of lateral thoracic support which provide posterior and lateral thoracic stability to clients with varying postures and functional needs. Each back is lightweight and adjustable, with numerous hardware choices allowing for easy installation. Four support height levels to provide support for clients with wide ranges of torso heights and levels of injury.