0.25 x 3.5 x 2." "Loose example of skin button made of latex. shaped with half of a sphere and a a hollow tube coming out of the side. smaller but similar to #00.5A.1 and 00.5A.4. Skin Buttons provided access to the body for tubes which led to and from the Thoracic Duct and made lymph dialysis possible." Ultimately they were used in lymphocyte depletion prior to transplant. (See assorted papers in T.S. Hargest's CV on lymphocyte drainage-skin buttons paper-#17." T.S. Hargest. CV)"