About this item Double filtration, effectively lifting filtration 50%, filtering , pure Up to 95% light transmittance, cold and glass, can withstand 150 degrees instantaneous temperature difference Made of 304 stainless steel, -, rustproof and washable Reasonable design of filter components will not slide down, effectively filter coffee powder and tea leaves More than 200 filtration tests are repeated to that the coffee extraction concentration maintains a good sense of damping