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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-22 · 7 min read · Independent comparison
• HEISENLIN's biggest strength: a single round 304 stainless steel crisper plate with a nonstick coating, a grab handle, rubber bumpers and a cleaning cloth in the box — a genuine one-for-one swap for the plate that came with your fryer.
• HEISENLIN's biggest trade-off: it's round, roughly 8.1 inches across, and aimed at 3.7–4.0 QT baskets from brands like GoWise USA, PowerXL, Dash, Chefman, Gourmia and Emeril Lagasse — buy it for a square or larger basket and it may not sit right.
• OUKEYI 8's biggest strength: three stackable square racks in food-grade 304 stainless steel that multiply your usable cooking area inside one basket and let you run several foods at once without them touching.
• OUKEYI 8's biggest trade-off: it's built for square air fryers with an inner size over 8 inches and 4.2–5.8 QT capacity, so it's the wrong accessory for a small round 3.7 QT basket.
• Who each is for: HEISENLIN for anyone replacing a worn or damaged plate in a compact round air fryer; OUKEYI 8 for anyone with a bigger square basket who wants to cook in layers.
The HEISENLIN plate is what I'd call a repair purchase, not an upgrade. It's a round crisper plate measuring about 8.1 by 8.1 inches, with listed dimensions of roughly 7.87 inches deep by 7.87 inches wide by 0.39 inches tall, finished in black. The build is food-grade 304 stainless steel with a nonstick coating, and the brand states it's BPA-free and free of the chemicals you'd rather not cook on. There's a handle on the plate, which sounds like a small thing until you've tried to lift a hot crisper out of a basket with tongs. The handle plus the four rubber bumpers in the box are the practical details that make daily use less annoying — the bumpers keep the plate from scraping around inside the basket, and the handle means you can pull it out without fighting it.
Who should buy it: someone with a compact round air fryer who needs a working plate again, and who values the extras — a nonstick cleaning cloth, four rubber tabs and a set of filter papers come in the package. Who should skip it: anyone with a square 5.8 QT basket, a dual-basket fryer, or an oven-style air fryer. HEISENLIN is also explicit that you should measure your basket before ordering and avoid scouring it with abrasive cloths or metal scrubbers, since that destroys the nonstick layer. Take that seriously — this is a coated accessory, not bare metal.
OUKEYI 8: Who It's For
The OUKEYI 8 is a completely different animal. It's a set of three square, stackable stainless steel racks, each one designed to sit above the other inside your basket. The whole point is vertical space: instead of one layer of food, you get up to three, and the grid pattern lets air circulate around each level so the food on the bottom rack isn't sitting in the drip zone of the food above it. If you've ever cooked wings for four people in two batches in a 5.8 QT fryer, you already understand why this matters.
The material is 304 food-grade stainless steel — the same base material as the HEISENLIN plate, minus the nonstick coating — and it's dishwasher safe. Stainless racks like this don't flake or peel, which is the trade-off against a coated plate: no coating to lose, but also nothing to make cleanup glide. The rack has a raised side surround so food doesn't slide off when you're loading it or lifting a layer out, and there's no assembly. You just decide how many layers you want for a given cook and drop them in.
Compatibility is where you need to pay attention. OUKEYI specifies square air fryers with an inner size greater than 8 inches and a capacity of 4.2 QT to 5.8 QT, naming Cosori, Instant Vortex, Nuwave, Philips, and Ninja Foodi Grill AG300/AG400 among others. Beyond the air fryer, the racks work in a regular oven, a microwave, a pot, or a steamer, and they double as dehydrator racks for jerky, dried fruit and dried meat. That multi-appliance reach is genuinely useful — it's the kind of accessory that earns its drawer space.
Side-by-Side: Which Should You Choose?
• Best for replacing a worn or missing plate → HEISENLIN Air Fryer Replacement. It's a one-for-one swap with a handle and nonstick coating.
• Best for cooking more food per batch → OUKEYI 8. Three stackable racks turn one basket into three usable levels.
• Best for small round 3.7–4.0 QT fryers → HEISENLIN. The OUKEYI racks are specced for square baskets over 8 inches inner and 4.2 QT and up.
• Best for square 4.2–5.8 QT fryers → OUKEYI 8. This is exactly the size range it's built around.
• Best for nonstick convenience → HEISENLIN. The coated surface releases food and wipes down easily if you treat it gently.
• Best for long-term durability and dishwasher use → OUKEYI 8. Bare 304 stainless has no coating to wear through.
• Best if you want extras in the box → HEISENLIN. You get a cleaning cloth, four rubber bumpers and filter papers alongside the plate.
• Best for multi-appliance use → OUKEYI 8. It's rated for oven, microwave, pot and steamer duty, plus dehydration.
In my opinion, the deciding question is your basket, not your budget. If you own a compact round air fryer and the original plate has given up, I'd buy the HEISENLIN Air Fryer Replacement — it's the correct shape, it fits the capacity range it claims, and the handle and bumpers make it easier to live with than a bare disc. If you own a square 4.2–5.8 QT fryer and your problem is capacity rather than breakage, I'd buy the OUKEYI 8; three stackable racks solve a problem a flat replacement plate can't touch. Check the current price on Amazon for whichever one matches your basket — but match the basket first.
FAQ
Probably not. OUKEYI specifies square air fryers with an inner size over 8 inches and 4.2–5.8 QT capacity. A compact 3.7 QT round basket is outside its intended range, and forcing it means the racks won't sit level.
Both are dishwasher safe. The HEISENLIN plate has a nonstick coating, so food releases with less scrubbing — but you must avoid abrasive cloths and metal scrubbers or the coating degrades. The OUKEYI racks are bare 304 stainless with no coating to damage.
Yes. OUKEYI rates the racks for oven, microwave, pot and steamer use, and they work as dehydrator racks for jerky, dried fruit and dried meat. The HEISENLIN plate is designed as an air fryer crisper plate.
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