[the most precious tool set] - V1 straight wide tube 32 inches (about 81.3 cm) long. Suitable for drying machines that clean shallow gaps. V2 slender round tube 33 inches (83.8 cm) long. It can be deeply cleaned to the bending gap of the dryer, and the hose is equipped with wires to make it easier to operate[almost suitable for vacuum cleaners] - our vacuum hose adapters are suitable for most vacuum cleaners, except for some Dyson cleaners, so there is no need to worry about connectors; It is easy to assemble and use. Ideal for light cleaning and heavy power cleaning.[prompt] - there are three ventilation holes near the adapter. The number of ventilation holes can be adjusted according to the actual use to increase or decrease the suction. Easily help you remove years of built-in fluff from the dryer vents, thereby reducing drying time and helping extend the life of the dryer.[dryer vents can be a disaster] - regular cleaning of dryer vents can prevent house fires and save energy costs. With this air duct cleaning tool, you will never finish this task again!