... hand crank handle on the left side, if a left-handed model, or on the right side, if a right-handed model. Use your appropriate hand ... the way to the left, guide the hose toward the right while keeping the hose windings in contact with the previous winding. ... Generally speaking, there are plastic(ABS) material ,zinc alloy with plastic, brass with plastic and aluminium alloy spray nozzle(spray gun).4 ...