They will be .355 taper tips. The only way this would not be the case is if the heads are previously used/modified and were rechromed to restore them to mint condition. It's very easy to check if you have the heads only and either a taper or parallel shaft handy. A taper will seat at the bottom of the hosel with little if any play. A parallel iron shaft will only penetrate about a quarter inch before it stops.

Thank you Ken, I figured they were taper tips, but I just wanted confirmation, before I bought the shafts. Many thanks.

As a follow up: I live in the United Kingdom and I am unable to locate a supplier here, tho' I am willing to purchase from anywhere in the world.....I am looking for 11 x Rifle FM 5.5 shaft bands, if anyone can point me in the right direction I would be very grateful.