Designed specifically for commercial use. Premium filter that meets or exceed OEM filter efficiency. Each filter bag is printed to easily identify the vacuum it fits. Proper filtration is vital when cleaning to prevent allergen & harmful particulates from being released back into the air. Janitized Vacuum Filter Bags provide indoor air quality, worker safety & facility clean air management. For Windsor. OEM / Compatible: Compatible; for Use With: Windsor Sensor XP / S Micro Filter; OEM #5301ER; Style: S; SP; Vacuum Type: Upright.