Extension Tube made for SPARES2GO to fit Hitachi Vacuum Cleaner. Dimensions: Length: 450mm, Large End Internal Diameter: 35mm, Large End External Diameter: 40mm, Small End Internal Diameter: 30mm, Small End External Diameter: 35mm. This part is suitable for vacuum cleaners that have a 35mm diameter hose connection. Please check your vacuum connection fitting size to ensure this product is suitable prior to purchase. *Please note: all dimensions indicated in this ad are approximate and may vary slightly from indicated measurements. They are included as a guide to assist you in selecting the right part for your machine*. This product is not manufactured by Hitachi but it is designed to be compatible with Hitachi machines. The Hitachi name, model names and any part numbers have been used for reference purposes only and are in no way associated with the original manufacturer.