Aftermarket · Made by Think Crucial · Not made by Shark
Replacement filters for the Shark Air Purifier 4.
Particle and carbon filters for the HE400, HE401, HE402 and HE405, part HE4FKPET. 2 filters for $35.99, $18.00 a filter.
SharkNinja sells its HE4FKPET filter at $69.99 each. Two from SharkNinja: $139.98. Our 2-pack: $35.99, $103.99 less.
- SharkNinja HE4FKPET × 2 at $69.99$139.98
- Think Crucial 2-pack$35.99
Shark list price on sharkninja.com (SharkNinja's own store) on October 6, 2026, before any sale, coupon or subscription discount.
- Shipping
Free U.S. shipping on every order
- Dispatch
Ships the same business day when ordered by 2pm ET
- Fit
Fit guaranteed on the models listed
- Returns
30-day returns with a prepaid label
Think Crucial vs. buying from Shark.
The same count, side by side. Shark's price is its list price on sharkninja.com on October 6, 2026.
| Air Purifier 4 · HE4FKPET | Think Crucial | Shark, same count |
|---|---|---|
| 2 filters | $35.99$103.99 less | $139.98 |
| Subscription | None. Buy when you need filters | Shark's own terms |
| If it doesn't fit | Prepaid return label, full refund, 30 days | Shark's own terms |
| Made by | Think Crucial (aftermarket) | Shark |
Shark price: SharkNinja HE4FKPET × 2 at $69.99, $139.98, on sharkninja.com (SharkNinja's own store) on October 6, 2026, before any sale, coupon or subscription discount.
What's in the box.
Exactly what ships, so you can match it against what's in your machine now.
- 2 ×particle and carbon filters
$18.00 a filter
- Fits
- Shark Air Purifier 4 HE400, HE401, HE401C, HE401NP, HE402, HE402C and HE405
- Replaces part no.
- HE4FKPET (Shark)
- Price
- 2 filters: $35.99
- Subscription
- None. Buy when you need it
- Made by
- Think Crucial (aftermarket, not affiliated with Shark)
- Ships
- Free, from a U.S. warehouse. Same business day when ordered by 2pm ET; arrives in 2–5 business days
Check your model.
Listed for the Shark Air Purifier 4 HE400, HE401, HE401C, HE401NP, HE402, HE402C and HE405. Two minutes now saves a return later.
- HE400
- HE401
- HE401C
- HE401NP
- HE402
- HE402C
- HE405
- 01Find the model number
The model number (HE4xx) is on the label on the back or bottom of the purifier.
- 02Match the part
Shark sells the filter for these models as HE4FKPET. This replaces it.
- 03Still not sure?
Email your model number to support@thinkcrucial.com and we'll tell you whether it fits. We reply within one business day.
Before you order.
Straight answers. Anything else, email support@thinkcrucial.com.
Q.01Is this made by Shark?
Q.02Does it fit the Air Purifier 6 (HE601/HE602)?
Q.03Which models is it listed for?
Q.04How many filters are in the box?
Q.05What if it doesn't fit?
Q.06Is there a subscription?
Q.07When will it arrive?
We make what we sell.
Think Crucial started in 2007 at a family vacuum repair shop. Today we're a U.S. company in Hollywood, Florida, making aftermarket filters, bags and parts built to fit the machines you already own. Most people can fit the part themselves. They just need the right one, and a way to check it first.
Questions before you order? Email support@thinkcrucial.com. We reply within one business day.
Ready to order
Replacement filters for the Shark Air Purifier 4
Part HE4FKPETFit guaranteed: prepaid return label if it doesn't fit the model we list. 30-day returns.
Not made by Shark. This is a compatible replacement made by Think Crucial, not an original equipment manufacturer (OEM) part. Shark and SharkNinja are trademarks of their respective owners, used here only to describe compatibility. Think Crucial is not affiliated with or endorsed by Shark. Shark prices from sharkninja.com on October 6, 2026, before any sale, coupon or subscription discount.
© 2026 Crucial Brands Inc., DBA Think Crucial. Hollywood, Florida.