... 2) Good performance 3) Safe operation 4) Price advantage. Refrigerator Copper Filter Drier: Main features: 1) Copper construction 2) ... pressure:3.1Mpa .Details:1) Drier and filter apply to refrigerator, freezer that use R12, R22, R134a, R600a, R407c, ... to throttle or other mini typeshermetical refrigeration system2) Absorbing extra water or moisture, strain feculence that might cause block problem, ...