A cheap F engine Minimum Diameter custom. Upper body tube and nosecone are the upper section of a Quest Penetrator kit (29mm), lower section is a 29mm engine/ body tube, engine block/coupler is from ASP Rocketry, fins made from Basswood from Hobby Lobby. Just under 23 inches tall. Paint only needed for black lower section. The Penetrator was built up as a separate shorter rocket using a NC-55 nosecone. 2 nice rockets for well under $20.