The swap that looks close
a tape-closed cube is the usual substitute for crash lock boxes, and it is the wrong one. A tape-closed cube is the right box when the size you need is not one of those six, or when the goods are not a small parcel.
Packaging Boxes lists Crash lock boxes separately because the jobs diverge as soon as the goods are on the bench.
What the right line actually does
A crash lock box opens into shape and has a peel-and-seal strip.
The category describes the board as 150K/T, recyclable and biodegradable, and sized towards Royal Mail small parcel guidelines. It lists six sizes.
If you have already mixed them
Taping over the peel-and-seal as if it were not there wastes both.
On Packaging Boxes, orders that include Crash lock boxes 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 Crash lock boxes when you already know this line. Pack quantities differ by size. Read the one you are buying. Packaging Boxes will still dispatch an order placed by 3pm on the same day.