Which Ninja models does this pot fit?

It fits the Speedi SF300, SF300C, SF301, SF301C, SF301H, SF301HGY, SF301HWH, SF302A, SF303CO and SF303. It does not fit other Ninja multicookers or air fryers.

Is this a complete cooker or just the pot?

Just the pot. It is the inner cooking pot only, with no lid, base or accessories, so it is meant for people who already own a compatible Speedi.

Can I put it in the dishwasher?

Hand washing is the safer choice. Dishwasher heat and detergent shorten the life of the nonstick coating, and the coating is the part owners most often complain wears out.

What utensils should I use in it?

Use silicone, wood or plastic utensils. Metal tongs and whisks are the usual cause of the scratches owners report on the nonstick surface.

How much food does the 6-quart pot hold?

It holds 6 quarts, enough for roughly 4 to 6 servings of rice, pasta, stew or a one-pot meal in a single batch.

Is it worth buying as a second pot?

If you cook consecutive meals in your Speedi, a spare pot saves washing between batches. If your original pot is still in good shape, there is little it adds.