The figure reveals the vacuum clutch system. This sort of clutch employs the prevailing vacuum in the engine manifold to work the clutch. The vacuum clutch consists of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  Go with a clutch package so you have got matching sections. https://clutch-plate32973.blogaritma.com/31380044/clutch-plate-an-overview