... increased by over 10%. The size are available in square, round and custom geometric shapes; sizes ... cut-to-size filters are also possible. Common size in Round shape:40x11mm, 40x15mm, 50x15mm, 50x20mm, 60x22mm,70x22mm, ... 80x22mm , 90x22mm,100x22mm, 305x25mm common sizes in Square shape:40x40x13mm, 40x40x15mm, 50x50x15mm, 50x50x22mm, 75x75x22mm,50x75x22mm, 100x75x22mm, 100x100x22mm ...