This Philips Saeco CA6701 is an espresso coffee machine decalcifier formula. The liquid formula has undergone years of refinement for a complete, yet safe and gentle, decalcification process that safeguards your coffee machine from limescale build-up. With regular decalcification, you increase the lifespan of your coffee machine and improve the flavour of your coffee. For optimum results, you must decalcify your coffee machine once every three months.