This Wagner Smart Sidekick Power Paint Roller is the perfect tool for any painting job. With a 3-inch roller diameter and a 9-inch roller length, it can cover all wall types with ease. The variable flow feature allows for a smooth and even application of all paint types, and the included handle, roller cover, and shed-resistant roller cover make it easy to use and maintain. The roller core size is standard and the product is compatible with all battery types. The handle length is 1 foot and the reach height is 16 feet, making it perfect for both interior and exterior painting jobs. This paint roller is a must-have for any home improvement enthusiast.