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“Compatible” describes whether it works. “Required” or “Useful” describes whether you should buy it.
Ninja · Part 814KKU500
SharkNinja lists the exact 814KKU500 XL tub on the NC501 product page and its part page names NC501 compatibility.
Safety qualification: exact tier-1/2 manufacturer or certification evidence is linked, with no active conflicting evidence.
Ninja · Part XSKPNTLD2
SharkNinja lists XSKPNTLD2 in the NC501 add-ons and documents two 24-ounce XL tubs with storage lids.
Safety qualification: exact tier-1/2 manufacturer or certification evidence is linked, with no active conflicting evidence.
Open the evidence, limitations, and model identity for a single accessory.