You are looking at a brand new - removed from new bike - Shimano BR-RS305 cable activated flat mount disc callipers front and rear. These are cable activated, so for non hydraulic brake levers. Good reliable and powerful cable operated callipers.
This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Brakes". The seller is "hobieneil" and is located in this country: GB. This item can be shipped to United Kingdom.