This is an Edwards B2 silver pipe that has been modified to be compatible with a Shires instrument. Shires threads have been installed. It has been shortened slightly to my preference, by about 1 cm. For reference, I've attached an image comparing its length to a standard Shires brass pipe. (The brass pipe is not included.) Even after cutting, it is still longer than a standard brass pipe. The threads from a brass 1st valve pipe were used, and a technician has stamped "B 1 + 1" to indicate that it is for the 2nd valve.