The Peterson Standard System Smooth 305 is a bent pipe with a tall Dublin bowl that incorporates the Peterson System. The Peterson System is a patent that was developed in the late 19th century and consists of a small reservoir between the chamber and the stem that traps the moisture and results in a cool, dry smoke. Like all the pipes in the Standard System Smooth range, the 305 has a walnut brown stain and a smooth finished, as well as a nickel shank and an army style stem with a Peterson Lip (P Lip) mouthpiece.