Product ID Variable Name

Hi,
Can anyone please tell me what is the variable name for product ID?

For example “customerShippingCountry” is pretty obvious, but how do I access product id? I tried a few variations such as “ecommerce.checkout.products.id” but no success. Thanks

customerShippingCountry: ”,
ecommerce: {
currencyCode: ‘USD’,
checkout: {
actionField: {step: 1},
products: [
{
id: 6797,
name: ‘Wiring Diagram’,
sku: 6797,
category: ‘Download’,
price: 40,
stocklevel: null,
quantity: 1
}
]
}
}
}