This is a Dyson style washable pre-motor filter for the DC07 and the DC33 bagless upright vacuum cleaner. It measures 135mm x 29mm not including the centre boss.

Pair it with the exhaust filter 

I know this is confusing, but other than the colour, and the internal filter media this seems to be the same as   That's because these filters are generic. 

As it's light, maximise the saving on postage and buy several of them, or some of the related parts below.

At the moment, standard postage within Australia is capped at a maximum of $25!