This is a New Steel Speedometer Gear Bullet Housing, seal, oring, and New 22 tooth TH350, Muncie, Saginaw, and other driven speedometer gear for small speedometer gear housing hole. This fits most GM and Chevy transmissions with a 7/8 inch speedometer gear housing hole. Here at American Hot Rod Solutions we have many other gears in our other listings too. If you need help figuring the correct gear please let us know and we will be happy to help you.  Thanks, Kerry The Speedometer Guy.