A compressor assembly configured to increase pressure of a fluid, the compressor assembly comprising: a first cylinder that forms a first space for compressing a fluid; a first piston housed within the first cylinder, the first piston being configured to reciprocate within the first cylinder so as to compress the fluid within the first space; a second cylinder that forms a second space for compressing the fluid that is separate from the first space; a second piston housed within the second cylinder, the second piston being configured to reciprocate within the second cylinder so as to compress the fluid within the second space; a first crank shaft housing operatively coupled with the first cylinder; a first crank shaft housed within the first crank shaft housing, the first crank shaft being configured to drive the first piston; a second crank shaft housing operatively coupled with the second cylinder; a second crank shaft housed within the second crank shaft housing, the second crank shaft being configured to drive the second piston; a motor housing operatively coupled with the first crank shaft housing and the second crank shaft housing; a motor housed within the motor housing, the motor being configured to drive the first crank shaft and the second crank shaft; and a connector disposed between the first cylinder and the second cylinder, and outside of the first crank shaft housing, the second crank shaft housing, and the motor housing, the connector engaging the first cylinder and the second cylinder with the connector maintaining the operative couplings between the first cylinder and the first crank shaft housing, the second cylinder and the second crank shaft housing, and the motor housing operatively coupled with the first crank shaft housing and the second crank shaft housing; characterized in that the connector is monolithic, and a position of the connector corresponds to a center of gravity of the compressor assembly. a first cylinder that forms a first space for compressing a fluid; a first piston housed within the first cylinder, the first piston being configured to reciprocate within the first cylinder so as to compress the fluid within the first space; a second cylinder that forms a second space for compressing the fluid that is separate from the first space; a second piston housed within the second cylinder, the second piston being configured to reciprocate within the second cylinder so as to compress the fluid within the second space; a first crank shaft housing operatively coupled with the first cylinder; a first crank shaft housed within the first crank shaft housing, the first crank shaft being configured to drive the first piston; a second crank shaft housing operatively coupled with the second cylinder; a second crank shaft housed within the second crank shaft housing, the second crank shaft being configured to drive the second piston; a motor housing operatively coupled with the first crank shaft housing and the second crank shaft housing; a motor housed within the motor housing, the motor being configured to drive the first crank shaft and the second crank shaft; and a connector disposed between the first cylinder and the second cylinder, and outside of the first crank shaft housing, the second crank shaft housing, and the motor housing, the connector engaging the first cylinder and the second cylinder with the connector maintaining the operative couplings between the first cylinder and the first crank shaft housing, the second cylinder and the second crank shaft housing, and the motor housing operatively coupled with the first crank shaft housing and the second crank shaft housing; characterized in that the connector is monolithic, and a position of the connector corresponds to a center of gravity of the compressor assembly. <EOS>