The swap that looks close
a coil of strap on its own is the usual substitute for strapping kits, and it is the wrong one. A coil on its own assumes you already have the tensioner and the seals.
Packaging Wholesale lists Strapping kits separately because the jobs diverge as soon as the goods are on the bench.
What the right line actually does
A strapping kit is the starting set: the tool and the strap, for a desk that is not banding yet.
Kits are listed apart from loose strapping.
If you have already mixed them
Reordering the kit every month piles up tools and still needs a check on the coil.
On Packaging Wholesale, put Strapping kits on the order with the lines it belongs to, so you are not paying a second delivery for the piece you forgot. Free UK delivery starts over £50 ex VAT.
Open Strapping kits when you already know this line. A kit is one set. The product page says what is in it. Do not assume spare coils. Packaging Wholesale will still dispatch an order placed by 3pm on the same day.