This part is from SM Marine
cost:
400
mass:
0.001
category:
Structural
TechRequired:
precisionPropulsion
engine_data:
standard
{"isp"=>{"vac"=>10500.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "IntakeAir"=>1.1}, "max_thrust"=>1.0}