These are the 4 piston/pot M Performance brake calipers. Fitting models such as the BMW. M135i, M140i, M235i, M240i, 320i, 335i, 340i, 435i, 440i. To fit these onto the above models, including the E series you'll need 340mm M140i brake discs & pads.
In fair condition as shown. Bleed nipples have been checked, all are free and moving, along with the pistons which have been checked.