This is a used cleaner head cover for older Sebo manufactured 360 models. 

Do a visual comparison to establish compatibility, and pay attention to the shape at the back of the head. These are similar to early Sebo BS36 ones, but they differ. 

As a used item, it will be in perfectly serviceable condition, but will have scratches and visual blemishes, and will want cleaning. 

The models this fits are variously badged as Jeyes, Lever, Diversey, Ensign, Electronic 360, ISS, etc. 

Despite being a different colour, this head will also fit brown Sebo HS2/HS360 and red Cleanfix 350 models.