The swap that looks close
void fill is the usual substitute for kraft paper, and it is the wrong one. Void fill takes space. Kraft covers a surface, such as crockery, before the item goes in the carton.
Packaging Suppliers lists Kraft paper separately because the jobs diverge as soon as the goods are on the bench.
What the right line actually does
Kraft paper wraps the item. It is not the material that fills the gap afterwards.
The rolls are described as ribbed, machine glazed, 88 gsm and 100% recycled. Sheets are on the same range when a roll is more paper than the bench wants.
If you have already mixed them
Crumpling kraft into the gap and calling it both wrap and fill usually does neither well.
On Packaging Suppliers, orders that include Kraft paper and are placed by 3pm are dispatched the same day. UK delivery is free on orders over £50 ex VAT. Stocked items can be returned within 14 days.
Open Kraft paper when you already know this line. A roll is not a box of sheets. Read which one the page is selling. Packaging Suppliers will still dispatch an order placed by 3pm on the same day.