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Retina screw has Six of 1.2mm holes improve water distribution.
Retina screw's Low profile design ensures the head space to minimize the influence on coffee puck.
Retina screw has O-ring makes the volt locate on the exact position and prevents water leakage.
Retina screw can be used with all screens and, it works even better with IMS screen.
Food grade stainless steel material with silicone o-ring
