The Original Einhell pre-filter is a practical accessory for ash vacuums. It can be used with any Einhell mains-powered ash vacuum. When vacuuming ash, the pre-filter protects the ash vacuum's pleated filter, thus preventing it becoming clogged quickly. This prevents contamination of the vacuum's motor and maintains the appliance's suction power. Easy to install in the ash vacuum, the pre-filter is fastened over the edge of the container via a drawstring. The filter is made of non-flammable material, but it is not suitable for vacuuming glowing cinders. The pre-filter can be reused several times, so after cleaning and drying it will be ready to be used again.