NilfiskCFM 40mm Hose-Tool Adapter For Connecting Round Brush Or Crevice Tool
NilfiskCFM industrial vacuum cleaner 40mm hose/tool adapter to quickly connect 40mm hoses to the round brush or crevice tool.
It's outside diameter is 40mm and the inside diameter is 38mm.
Most often used with the NilfiskCFM 118 industrial vacuum cleaner
Shown in the 50mm version in the photos, connecting the parts in the first photo, and at the rear centre standing up in the second photo.
At the moment, as postage is capped at a maximum of $20, maximise the saving on postage and buy some of the related parts below, such as dustbags and a new hose, or a new floor tool and some other accessory!