This tool is ideal for cleaning between the sofas or for using in the car. Fits all versions of the following models;DC16, DC19T2, DC22, DC23, DC24, DC25, DC26, DC27, DC28, DC29, DC30, DC31, DC32, DC33, DC34, DC35, DC36, DC37, DC38, DC39, DC40, DC41, DC42, DC43, DC44, DC45, DC46, DC47, DC48, DC49, DC50 (Small Ball), DC51, DC52, DC53, DC54, DC55, DC56, DC58, DC59, DC63, DC65, DC66, DC75, DC76, DC77, DC78, Big Ball, V6 and Cinetic models.£4.99
Dyson DC50 Washable Pre Filter
This is the filter located inside the cyclone unit. While it might look like other filters, this will only fit Dyson DC50 range of vacuums.
While not a Genuine part it is a great alternative, and it costs less.