FB3
These bags have been discontinued.
The recommended replacement bags are the Universal Synthetic Vacuum Bags.
Popular ducted vacuum models which used these bags:
Aussie Vac: AV1200, AV1300, AV1400, AV1500, AV1600, AV1700, AV1900, AV2200, AV2400, AV2600, AV2800, AV2900, PA1300, PA2600
Astro Vac: AS3000L, Hurricane
Valet: VL200, VL300
Premier Clean: Monarch Range models - 250, 490, 550, 650