It can be connected to a hose with a diameter of 3.9 inches (100 mm) and a hose with a diameter of 2.5 inches (63.5 mm) or a tool dust
The mouth of this adapter is 2.2 inches (57.15 mm) in diameter and is perfect for dust collecting ports with a diameter of 2.5 inches (63.5 mm), so it can be easily connected with a diameter of 2.5 inches (63.5 mm).