All the features of the Thing-a-ma-Jig but in a smaller package! The ultimate first rocket! Perfect for classrooms, can be built in less than 1 hour! Fins don't fall off while white glue dries! Fins are guaranteed straight every time! Specifications: Len: 10.81" Dia: 0.736" Span: 4.14" Weight: 0.35 oz. Rec: Streamer Rec. Motors: 1/4A3-3T, 1/2A3-2T, A3-4T