From Amazon
Leitz Trusens Pet 3-in-1 HEPA Filter Drum, Washable Prefilter, HEPA Filter, Carbon Filter, For Leitz Z-3000/Z-3500 Air Purifier, Captures Pet Odours, Dander, Pet Hair, Odours and VOCs, 2415131
Viking Direct
TruSens Hepa Filter 2415131 2.087 x 2.12 cm
OnBuy
Leitz 2415131 air purifier accessory Air purifier filter