Generic Full Filter Grid Element for Nautilus/FNS and MicroClear Filters - 48 Square Feet filter-length_19 5/8 inches This bag is great for

This bag is great for picking up larger debris and pine needles

50 inches for the rail tubing and the distance between the front (pool) rail and back (anchor) rail is 60 inches

They are translucent for visible content level

no venting is necessary

Generic Full Filter Grid Element for Nautilus/FNS and MicroClear Filters - 48 Square Feet filter-length_19 5/8 inches This bag is great forThis is a Generic Full Filter Grid Element replacement for 48 square foot FNS Nautilus and ProGrid MicroClear D. E. filter grid elements. This is a full grid assembly measuring 24 inches. This filter element is used in the ProGrid DE4820, MicroClear DE4800, and MicroClear DE 480S Stainless Steel filters. It is also used in Pentair FNS48 Pool and Spa D. E. Filters, Nautilus NS48 and Nautilus Plus NSP48 Pool and Spa D. E. Filters. Also fits Zodiac DEV48