VST Precision Filter Basket 7g Ridged. Features VST's new precision filters deliver consistent extraction performance over a wide range of concentration with reduced sediment. Designed to extract properly as a ristretto, normale or lungo with minimal or no change in grind setting at a fixed dose. Filters are matched for total square area to /- 5% to ensure identical performance(typical variances of standard filters range from 50-200% of nominal). All VST Filters are WARRANTED for ONE-YEAR and for ZERO DEFECTS and 100% of VST's filters are inspected on the VST Digital Filter Imaging System. Holes are fabricated using a new micro-machine and finishing process100% of holes are measured on every filter for min/max range limits on area and diameter to a precision of /- 20 µm (QC report provided with every filter)All holes are measured for circularity placement square area and blocked holes. Hole pattern is centered to /- 1.0 mm and placement is oriented for uniform extraction throughout the entire puck. Wide outlet angle to prevent filters from clogging anti-wear design ensures uniform performance for life of product. Improved structural integrity will withstand deflection from pump cycling without premature fatigue failures (see VST Warranty) Recommended tamper size: 25, 22, 20, 18, 15-g: 58.40 0.00 -0.05mm diameter flat face 7-g: 40.7-40.9mm
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