This Finishing Lines billet reservoir kit is great for car enthusiasts who want to upgrade their braking systems. It's perfect for use in projects involving Wilwood master cylinders, especially in Booster Delete setups but can also fit other applications. The kit is made of billet aluminum, which is durable. It comes with a billet reservoir body, a cap with a rubber diaphragm, an adapter fitting, and a round collar. While specific size and weight aren't given, you can expect it to be a well - made and practical addition to your car's braking system.