The only way to be sure you will receive the correct part for your appliance is to provide full model details off the sticker on the appliance itself. If you send us a photo of the sticker this gives us all the information we need to research the correct parts.

Built-in Ovens - the sticker is usually visible when you open or remove the door. Some manufacturers put the sticker on the underside of the control panel (facing the floor!). If this is not visible then the oven may have to be removed from the cavity to check if there is another sticker
Freestanding Ovens - the sticker is usually visible when you open or remove the door. Often there would also be a stiocker on the back of the appliance. If you still can't find it: check the warming drawer area if it has one (sometimes you need to remove the drawer).
Gas, Induction or Ceramic Cooktops - the sticker will be on the underside of the appliance
Dishwashers: Usually on the door. Bosch dishwashers sometimes have it stamped into the door so can be hard to see at first
Fridges - Varies but often visible with a door open or on the back