The MAXWELL BLOCK 2 from Phase Four is a Spacecraft Thruster with Thrust Up to 0.013 N, Thruster Mass 5 Kg (Dry Mass), Specific Impulse Up to 700 Sec, Propellant Mass 5 Kg (Dry Mass), Power Consumption 300 to 500 W. Tags: RF Ion Thruster. More details for MAXWELL BLOCK 2 can be seen below.