This is a training mouthpiece used by Muhammad Ali during sessions at his training camp in Deer Lake, Pennsylvania in the mid 1970s. From the collection of his longtime assistant trainer Wali Muhammad (1971-1981), this artifact is clear rubber and labeled ALI in black marker in the hand of Wali Muhammad. This mouthpiece shows wear. Equipment used by Muhammad Ali is very scarce, especially with this kind of provenance. LOA from the daughter of Wali Muhammad. LOA form Craig Hamilton of JO Sports, Inc.