Universal Diffsuer Fits Most DryerFor 1.65-3.15inch4.2-8cm Nozzle. This diffuser has a rotary locking mechanism that enables you to adjust its opening to fit any dryers that you have. Easy to Install and Release All you need is to twist the base, slide your dryer barrel in and press the button on the base. And there you go, it's ready for use. We've also included a user manual for you just in case if there're any questions. Large Bowl for Fast and Safe DryingYou can style and dry your hair in the same time! The honeycomb-designed diffuser gives the heat a more even and larger distribution area, not just in 1 spot like a hair dryer does. With universal hair diffuser, you do not need to worry about being too close to the hairdryer and getting burned. The larger bowl is better even with shorter or mid length hair. Honeycomb Design to Achieve Voluminous and Frizz-free ResultsOur bowl is designed based on the honey bomb structure to ensure the heat and air is spread out evenly without disturbing your curls and heat-damaging your hair. NOTEBlow dryers over 2000W with AC fans motor, DC motor or on high settings are not recommended for use with the diffuser. Please using the diffuser on low heatlow speed setting at first.Rubber Clamps to Prevent ScratchesThere are 3 pieces of resilient rubber to ensure that the diffuser stays snugly on the blow dryer while not hurt and scratch your dryer barrel. A must have for curly hair girls and hairdressers. Ideal for both home and salon uses.