Sounds like a good deal Probably not a selling ploy, most folk probably don't worry about spear diameters, they just assume a decent manufacturer will supply something suitable. Not sure if you really needs a 7mm spear for UK waters (even my Rob Allen Sparid had a 6.6mm double notched spear, which seemed pretty hefty for most UK fish), I was happying to move to a thinner Omer 6.3mm spear next (also double notched but probably not suitable for anything more than 2x14mm). But if you want to try 2x16mm rubbers a 7mm spear should easily handle it.