What is a Flared Pump Tube?

We take a standard pump tube and make both ends just a bit bigger.  This allows the connection of two different sized tubes without the usual struggle. An example is the pump tubing used for the internal standard on an ICP-OES / ICP-MS which usually has an ID of 0.2 to 0.4mm and is incompatible with the sample tubing OD of 1.3mm. The flared end of this pump tubing allows the larger sample capillary tubing to be inserted.