This cool J-Cobs Samsung Galaxy S3 Piston Dock is made from a 1940's radial engine piston called the WWII Jacobs R-755. The piston was used to power such airplanes as the Beechcraft Staggerwing, Boeing Stearman 75, and Avro Anson. In this bare metal edition, the piston has been left raw right off the plane and blasted to expose bare metal. The piston measures 5" in diameter and 3" in height. This J-Cobs piston dock, designed to show off your Samsung Galaxy S3, is marked with a Flying Monkey stamp. A Plane Pieces Inc. original, this piston dock is made in the USA. The 50-piece limited edition features hand-engraved numbering at the bottom of the charging dock. The dock comes with a 6-foot Micro USB cord. The charger is designed to perfectly fit a phone without a protective case.