Dry mass  Diameter  Length 		    
     				kg	m	to end of nozzles
Transtage (-1973)               1960?   3.05     4.51
Improved Transtage (1973-)	1828    3.05     4.51
Agena                            556    1.52     6.32                    
IABS                             270    2.90     0.70
IUS SRM-2                        985    2.5?     3.1? (with EEC)
IUS SRM-2 (STS)                 1010    2.5?     3.1?
Mage 1                            30    0.76     1.30
Star 27 (in GOES adapter)         30?   0.68     1.3?