These replacement Style Z upright paper bags fit Eureka upright vacuums that take the Z bag, with part #63881A10 offered as an alternate option. The paper wall traps dust and allergens while air flows through to the motor. A loaded or torn bag is the usual cause of weak suction on a bagged upright, since clogged pores choke airflow and dust can slip back into the room. A fresh bag returns full suction and keeps captured debris sealed for clean disposal. Fits: Eureka uprights that use Style Z bags Part: Alternate option #63881A10 Quantity: 3 bags per pack Tip: Swap the bag at roughly two-thirds full to hold suction steady Each bag mounts on the collar without tools. Check that your Eureka model takes a Style Z bag before ordering.