Mini Delta Ribbon or ‘MDR’ is a half pitch version of the D Ribbon connector, based on .050” or 1.27 mm pitch. In wide use since the late-1980s, MDR is a proven, reliable I/O platform used for system to system or “box to box” communications with an installed base of millions of ports to date. The MDR connector is available from 3M, which claims the industry’s largest array of product options for 1.27 mm pitch ribbon style connectors.