The Trend T31/1/A Micro Filter Bag prevents clogging  The Trend T31/1/A Microfilter material bag for dry use only with T31 dust extractor. The inner layers of the T31/1/A collect the coarse dirt and dust particles, this then protects the outer layer against clogging for increased performance. When compared to paper filter bags, the T31/1/A has a greater air-permeable structure, giving increased suction. Features:   Increased performance and heavier duty Filter bag inner layers collect coarse dust and dirt particles and protects outer layer against clogging The bag material has a greater air-permeable structure when compared to paper filter bags so giving increased suction Specification:  Capacity Approx: 30 litres  Size Flat: 545 x 395 mm  Weight: 0.2kg