Legris LF3000 Series Straight Tube-to-Tube Adaptor, Push In 12 mm to Push In 12.5 mm, Tube-to-Tube Connection Style

Barbed Connectors enable flexible tube of different diameters to be connected together, using a simple push-in fitting.

The "Tube Size" data quoted in the form "4mm (OD, plain end); 5mm (ID of tube to connect, barbed end)" relates to the Outside Diameter of the plain (non-barbed end) of the connector, and the Internal Diameter of tube that will push on to the barbed end of the connector on the other end. Further details are available through the manufacturers website: http://www.legris.com