The Piston Photo Frame (Metallic Edition) is a custom piece influenced by the industrial art style. It is made in the USA and created from a 1940's radial engine piston called the WWII Jacobs R-755. The piston was used to power airplanes such as the Beechcraft Staggerwing, Boeing Stearman 75, and Avro Anson. The piston has been satin polished to a metallic finish and machined at a 70-degree angle for excellent viewing. It measures 5" in diameter and 3" in height. The frame is 4" in diameter. Just trace your photo with the use of the supplied frame cover, cut out 4" round from the photo, put the photo in the piston slot, and cover it with the frame cover. This 100-piece limited edition features hand-engraved numbering at the bottom.