In the video for installing a p-trap drain , two pieces are shown and it says to make sure you get the size for your fridge. How do I know which one is which? Is it the same part #? My fridge has 36" doors.

It seems that the only part number I see coming up for a p-trap drain kit is “W10619951”. In the video, it says there is a different kit for a fridge with 30″ doors, and ones with 33″-36″ doors. How do I know which part to get? I cannot find any place that clearly states which part number is for which size doors. Any help is appreciated. Thanks.