It is a grill located in the Krusty Krab kitchen behind the order window and in between a stool with an unidentified purpose and the deep fryer. It is gray in color and has a grayish dark-blue stove. Below it, there are several switches used to control the Fahrenheit degrees.
The model according to Mr. Krabs is a Grill King 3000.
Role in series
The grill is usually used by the restaurant's fry cook, SpongeBob SquarePants. Due to his obsessive attachment to his job, he finds it hard to adapt to the different nature of any other restaurants' grills, as seen in "Welcome to the Chum Bucket."
Instances of removal/replacement
The Krusty Krab grill has often been taken out of the kitchen when non-Krabby Patty items are introduced to the menu, much to SpongeBob's horror.
In "Bossy Boots," the grill (along with SpongeBob's spatula) is removed from the kitchen so SpongeBob can properly make salads.
In "Big Pink Loser," to see if he's copying him, SpongeBob puts a fake hand that looks like his on the grill while Patrick does the same to his actual hand, causing the latter to burn his hand from elongated exposure to the grill.
In "Graveyard Shift," during the montage of SpongeBob praising the Krusty Krab's 24/7 hours of operation, he burns his hand from the grill.
In "Just One Bite," Squidward burns his face on the grill after a failed attempt to eat a Krabby Patty that SpongeBob made.
The grill is sometimes relocated from its normal position under the window, such as in the episode "My Pretty Seahorse," where the grill is across from the window.