3.33 oz. Autosol has been around for a very very long time in Europe and is now being sold in North America and abroad markets. It is a very successful product back in Europe so let's see how it does here... Think, rich dry abrasive formula. It dries easily so make sure you keep putting the cap back on after use, or you will have another use for it, as a paper weight! We strongly suggest using a good clean cloth (or buffing sponge/wheel) to apply it with, the amount of oxidation it removes from aluminum will shock you! You really don't need that much to make those metal parts shine. A little bit (about the amount you would use on your toothbrush) is our suggested amount per use. Rub in on, let is dry to a haze and then go at it. As you work the Autosol polish into the metal parts, you will start to see the oxidation start to come off and turn the Autosol dark grey and the cloth/wheel near black. This is Autosol working its magic. Keep working with it until the the cloth/wheel is black and shiny. Then switch to a new area of the cloth/wheel and keep going again (and again, and again) on the part. Every time you work the part, the better and like new it will look! It is really amazing stuff! We tried it on 20+ year old, outside, neglected parts and while elbow grease and time was needed, the parts looked new at the end of it all! No kidding! You almost want to go to the junkyard just to brighten things up a bit!! haha. Hand working the Autosol is needed in tight areas, you have to get it warmed up so be prepared for some work. Using the automatic method (buffing wheel) is easier and the results turn out faster and better, but it is best to take the parts off the bike first. The middle ground is using a high speed (3,000+ rpm) drill with a buffing wheel on the end, that way you don't have to take all the parts of your bike off and get a good result. Autosol has been a staple in our garage for years and we have used this product on all types of metal. Cost was excellent for what the product is and does. We found it to be mcuh cheaper in price compared to other competing products.