This is your chance to get a very rare part of history. This is an engineering technical drawing and parts list for the Titan SRMU (Solid Model Rocket Upgrade) program from Hercules. This is the complete assembly book includes many drawings of Adapters, insulators, Flanges, Casings and parts lists. Includes some complete assembly drawings, electrical drawings ect. This is a very cool detailed technical book and an aswsome part of history! More info on the SRMU project can be found here Solid Rocket Motor Upgrade - Wikipedia