Material: These vacuum adapters are made of high quality PVC, which is durable and easy to use, which is ideal for most vacuum cleaner hoses. Fits most diameters: These adapters fit most vacuum hoses as most diameters are 32mm or 35mm. You can also cut the vacuum adapter to the required diameter from 21mm to 35mm. Applicable to different brands: The vacuum cleaner hose adapter is applicable to manufacturers of different brands, such as Bosch, Aigen, Parkend, Krcher, Maki, Meetab, Worx, Domen Ze, AEG, Nilfisk, Mulmaster, Festo , Bosch, etc. Wide Application: It is ideal for dust removal tools such as curve saws, circular saws, belt sanders, arbitrary rail sanders, table saws, orbital sanders, scroll saws. Package includes: 3 PCS dust collectors. Can be used straight or cut as needed to use a saw or cutting machine. NOTE: These adapters apply to the vast majority of vacuum hoses as most diameters are 32mm or 35mm. However, if you have any questions, please check the diameter of the existing top pipe or pipe end fitting before purchasing and compare with the image/size chart above. Features: Material: Plastic The color black Inner diameter: 21mm, 25mm, 30mm, 35mm Outer diameter: 26mm, 30mm, 34mm, 42mm Length: 20mm + 20mm + 20mm + 40mm Inner packaging: 3 x wax tube adapter NOTE: Due to manual measurement, there may be an error of 0-2mm. Due to shooting methods and display devices, the color shown in the picture may not be exactly the same with the actual item, Please make sure you dont worry, thanks If you have any problems during use, please feel free to contact us Quantity delivered: 3 pieces