BioDezine Upper Extremity Support Tray Surface (U.E.S.S.), including; clear 3/8" lexan (shatter resistant), a pair of slide channels with adjustable tray stops, a rear securing fastex buckle strap, and up to 3 three rims on the three perimiter edges. Our slides come with an adjustable stop which controls how close the inner rim of the support surface will come to the client. The rims will help in holding objects on the U.E.S.S. The U.E.S.S. is useful in upper trunk positioning when "righting" of the client requires stabilization using the arms. It is also a very useful surface for learning materials, food and other A.D.L. items