This is the Genuine MG Rover Power Steering Pump as fitted to Rover 75 and MG ZT models using the KV6 engine (both 2.0 and 2.5 KV6).
Brand new 'old stock' that has been correctly stored and recently re-discovered!
These are interchangeable with the 'bolt on pipe' version, however you may need to adapt your pipework slightly to fit.