Considering the majority of users，NOOTO 4 inch to 2 -1/2 inch Reducer Fitting The purpose of production is Connect the standard 4-inch diameter dust collection hose to other standard 2 1/2-inch diameter dust collection hoses to This reducer can effectively complete its work and improve efficiency!

Due to the frequent use of this accessory in woodworking work, most people find it inconvenient to install larger dust collection systems in their workplace. You can try this accessory, which can reduce the hose size to 2 1/2 inches, which is suitable for most store vacuum cleaners

This type of reducer can also be used in machinery with the assistance of other accessories. Because its size is similar to that of 4-inch and 2 1/2-inch mechanical or workshop wet/dry vacuum ports. By using a 4-inch diameter rubber coupling or a small 4-inch hose, you can directly connect the reducer to the 4-inch port on the machine that matches the interface.

Because some workshop equipment uses hoses and hose adapters of different sizes, please measure your usage ports before making the decision to purchase this product!

SPECIFICATIONS：Nominal 4 inch end is 3-61/64” OD and 3-41/64” ID; 2-1/2” nominal OD end measures 2-15/32” OD and 2-9/32” ID.