Dispose of your dust for recovery and disposal into these Runyonpac Dust Extractor Disposal Bags. The bags are made of strong polyenthylene material to withstand the heavy dust collected. The bags are easily changed and tie-clipped after dust extraction. This depends on the users transfer and handling weight capability. Collect dust for easier clean-up and disposal with the 4-pack of 72-foot long Runyonpac bags. This box includes 240 zip ties (60 zip ties for each 72-foot long Runyonpac bag).