The lines that belong together
Single wall shares an order with tape and, if the fit is loose, with fill.
Single wall, tape and fill are separate lines. Crash lock is a different box, with a peel-and-seal strip.
The line that stays separate
double wall stays on its own order line. Double wall is the stronger board, manufactured in the UK, for heavy, valuable or fragile goods and for a stack. A bigger single wall box is not that board.
Single wall boxes is the range Packaging Boxes uses for single wall boxes.
One basket
The single wall range is the general cube. It is not the double wall range, and it is not a postal format by itself.
At Packaging Boxes, Single wall boxes does not change the cutoff. Orders by 3pm leave the same day. Under £50 ex VAT the delivery is still available. It is just not the free threshold.
Open Single wall boxes when you already know this line. Bundles have a quantity. Read it before you order one bundle and expect a hundred. Packaging Boxes will still dispatch an order placed by 3pm on the same day.