This is a Dewalt OIL TANK CAP designed for the Dewalt DCCS670 FLEXVOLT 60V MAX Chainsaw. The cap is yellow in color, with a length of 16 inches. It is a battery-powered chainsaw with a brushless engine type, featuring a chain brake, automatic chain oiler, and cordless operation. The battery life is approximately 60 minutes, and assembly is required for installation.