This is a Fein 913048K01 Dust Bags (Pack of 3). 3 Pack of disposable dust bags for the 9-77-25 Mini - Turbo Vacuum Designed for use with a 1 Micron or HEPA filter. Cannot be used with the 5 Micron filter. You must use a bag when using a HEPA filter. Keeps debris from spreading inside the tank. Collects larger particles of dirt and debris for two-stage dust collection and easy disposal.

3-Pack of dust bags for 9-77-25 Turbo III & 9-88-35 Turbo IV Vacuum
Disposable bags collect dust and particles picked up by vacuum
Designed for use in conjunction with 1 Micron (TII1MCRN) or HEPA (TIIHEPA) filter
Collects larger particles for two-stage dust collection

Fein 913048K01 Dust Bags (Pack of 3)

Collecting Dust