USA Lab USA Lab 1 & 5 Micron Sintered Disk - 316SS - 350PSI - 3" ,4" ,6", 12" The USA Lab 1μm & 5μm Sintered Filter Disk allows for finer filtration during the ext MSRP: $299.00 - $999.00 Was: Now: $199.99 - $499.00 Options