| Official name | SL-4 R/B | 
| Alternative name | Blok-I (Soyuz SL-4 (A-2)) | 
| Cospar ID | 1966-015B | 
| Norad ID | 2071 | 
| Launch date | 1966-02-22 | 
| Launch site | TTMTR | 
| Launch vehicle | Voskhod | 
| RCS size | UNKNOWN | 
| Decay date | 1966-04-29 | 
| Shape | Cyl | 
| Mass (kg) | 3000 | 
| Diameter (m) | 2.66 | 
| Height (m) | 9.4 | 
| Span (m^2) | 9.4 | 





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