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Silicone ball for non-return valve on polysulfone milk pumps, designed to ensure quick and reliable closure within milk pumping systems. Made of high-quality food-grade silicone, it offers excellent elasticity, durability and resistance to detergents used in washing cycles. Ensures the proper functioning of the non-return valve, preventing reflux and maintaining maximum circuit hygiene. Ideal as a precise replacement for milk pumps with polysulfone body.