A pair of nice quality black stainless steel tap hole covers - new and unused. They are designed to cover holes left in your kitchen counter or sink area when you e.g. replace dual inlet taps with a monobloc tap, as I did. I'm giving them away as they are too small (having bought them because the dimensions provided were incorrect).
Their actual dimensions are what I believe is the standard size: 50 mm diameter x 55 mm tall (i.e. the length of screw joining the two discs together - one goes over the counter, forming the cover, and one goes under the counter to fix the cover into place).
The first photo shows you just the cover as you will see it once installed. The second photo shows both pairs (each consisting of two discs) - on the right you can see the undersides of one set of discs.