The HART reusable cloth filter is for everyday dry pick-up of general household dirt and debris. The VRC51 3701 fits 5-16 gallon HART wet/dry vacuum models as well as most other 5-16 gallon standard wet/dry vacuums. The standard design allows the filter to be installed quickly and easily – just slide the filter over the filter cage no mounting band required. For dry pick-up only. Do not use the filter to vacuum hazardous or toxic materials. Do not vacuum anything that is burning or smoking such as cigarettes matches or hot ashes.