2  popular Amidon FT50-75 ferrite toroid cores.  (5975000301) (FT50-J)

as used in many QRP circuits, SWR meters, interference suppression, etc.

O/s diameter 0.50"    75 mix ferrite.

For measurements and full data,  http://tritium.fis.unb.br/Fis3Exp/fcim.csdc.com/fcimis/compid./ind/toroid.html

Low B.I.N. price

Post and packing, within the UK, is £1.65    Europe £1.95. other, £2.95

FREE INSURANCE.

See other components and tools at low prices in the amtools e bay shop.  Postal discounts given whenever possible, prior to checkout.