The shipping data for a specific product in a specific channel can be edited and overridden.
Overriding Shipping Settings
Channel > Channel Products >Select the Item > Edit > General > Shipping tab.
The shipping data for this product, in this channel, can be edited (or overridden) from the shipping tab:
Ship Weight is used to override the item's expected weight at the time of shipping.
Ship Days is used to override the number of days a customer should expect to wait for this product to arrive when ordering in this specific channel:
Ship Price is used to override the global shipping price for this product:
Be sure to click Save before continuing: