FUNNEL WEB AIR FILTER - BETA RR/RRS 13'-19', X-TRAINER 15'-22'Designed and manufactured in Australia, utilising the latest technologies in open cell foam 3D profiling, the pyramid profile of the foam effectively doubles the filters outside surface area without increasing its overall size. Compared with conventional air filter foam, the pyramid profiled foam will: Provide a 100% larger surface area Trap dust evenly over the increased outside surface area of the filter vastly increasing the filters dust holding