American, Hayward, Pac-Fab 7 full + 1 partial SET. Note: Collar has open slot (2 notches). Length is measured from one end of the grid to the other (collar not included). Diameter: not available; length: 18-inch; width: 11-inch Top end cap: not available, 0-inch inner diameter; bottom end cap: not available, 0-inch inner diameter Pleat count: not available; filter media: not available; filter are
