Pondmaster 1-1/2" MPT x 1-1/2" Double Stepped Barb (MPN 12937)

The first statement states that it is a 1-1/2 MPT x 1-1/2 Barb connection. It means that there is a male pipe thread (MPT) of size 1-1/2 on one end and a barb of size 1-1/2 on the other end. The second statement highlights the unique feature of this barb connection. It has a double stepped barb design that is able to accommodate all types of 1-1/2 tubing. This means that regardless of the specific type of 1-1/2 tubing you have, this connection can securely fit and be compatible with it.