The Bosch VB170P plastic dust bags are durable and more tear resistant than paper bags, making this a great option when cleaning up or extracting large, sharp chips of concrete. They are designed for use with Bosch gas20-17a 300-cfm dust extractor. This bag is ideal for drywall work, since, unlike paper bags, There are no pores for dust to pass through or clog. Using a plastic dust extraction bag is an easy, efficient way to clean up the dirt and debris in the canister. Use This bag only for vacuuming dry materials.