Star 30s

Star 30 is a series of solid upper stage motors, often used a apogee kick motors.

here a listing of all variants:

Star-30BP, standart variant, used on: HS-376

Star-30C, shorter nozzle but more propellant, used on: HS-376, LM series 3000

Star-30BPC, combining the former two, used on: HS-376, Start-1 Bus

Star-30E, more propellant, standart nozzle, used on: Skynet 4, Koreasat, ORBEX small orbital launcher