You are looking at a cluster gear for a M-20 wide ratio Muncie 4 speed transmission. It has a 1” diameter pin. The tooth count is 17, 19, 22 & 29. It is correct 63 to 65 Muncie M-20 with 1” pin. No chips or excessive ware. Comes with pin and bushing. Ready to use. REAL GM. Not those cheap knock offs.